anisotropic hyperfine interactions
Abstract. This is the essence of the anisotropic hyperfine interaction (AHF). Nucl. Brown, Rep. Inv. Sol. Grant, J. Appl. 4(1966)185. and Mn. 42(1971)1619; See also Fatseas et al., ref. To get an initial idea of the expected behavior, we started with the toy radical pair introduced above. Hebd. Comparison of quantum and (semi)classical calculations is a standard way of assessing “quantumness” in other contexts. This is the case if there are contributions of s-orbitals to the molecular orbital. The dipole–dipole interaction between the magnetic moments of the electron and the nucleus is … Two common mechanisms by which electrons and nuclei interact are the Fermi contact interaction and by dipolar interaction. Chem. The energy term of this so-called Fermi contact interaction is given by, $$ \mathcal{H}_{contact} = \left( \frac{2}{3} \right) \frac{\mu_0}{h} {g} \mathcal{\beta_e} {g}_n\mathcal{\beta_n} \left| \mathcal{\Psi} \left (\begin{array}\text{0}\end{array}\right) \right| ^2 \mathbf{SI} \qquad (11) $$. ϰ = g e g N β e β N 8 π 3 S →. Sol. Somewhat related observations at higher magnetic fields, for radical pairs in solids ( 46 , 47 ) and in viscous liquids ( 48 – 50 ), appear to have their origins in electron–electron dipolar interactions and g -tensor anisotropy. The magnitude of the anisotropic hyperfine interaction depends on the orientation of the paramagnetic systems with respect to the external field (B). A new muonium centre, termed Mu x, with anisotropic hyperfine interaction has been discovered in crystalline silicon in transverse-field muon spin rotation experiments.Its hyperfine tensor is very close to that of bond centred muonium (Mu BC).The new muonium centre has been observed only in some of the many samples investigated. (a) APS/ Alan Stonebraker; (b) Y. Zhang et al. Analysis of the anisotropic 129Xe (enriched), and 83Kr hyperfine structure shows the H atoms are trapped in the octahedrally symmetric interstitial site (6 nearest neighbors) of the Kr and Xe matrices. R. H. Herber. The anisotropic hyperfine interaction allows entanglement of two nuclear spins using microwave pulses. J. Yukio Kurita, Walter Gordy. r → I → . 4) is, however, important for the order of the mI states in the different mS manifolds. 8. P. Palvadeau, L. Coic, J. Rouxel, F. Menil and L. Fournes, Mat. Zagefka, T. Butz and A. Lerf, Mat. [ 7] Figure 1: (a) The magnetic dipole field produced by an electron spin. volume 33, pages133–144(1987)Cite this article. The transitions are labelled by their nuclear magnetic spin quantum numbers. 2 Citations. We present a detailed theoretical analysis of the noble-gas nuclear-spin relaxation due to the anisotropic magnetic-dipole hyperfine interaction between the noble-gas nucleus and alkali-metal valence electron vis à vis the already well-understood (spin-conserving) isotropic magnetic-dipole hyperfine interaction in alkali-metal–noble-gas systems. A.M. van der Kraan, Phys. 4 the effect of the hyperfine coupling on the energy level diagram and the EPR spectrum is illustrated for the simple case of isotropic EZI and HFI for a spin I = 3/2 (e.g. We report the first measurement of a tune-out wavelength for ground-state bosonic Dy and linearly polarized light. Systems With I > ½ Hyperfine Powder Lineshapes. Part of Springer Nature. The anisotropic layer compound FeOCl has been synthesized by two different techniques to give, respectively, a large single crystal blade-like product (SC) Hyperfine interactions in the anisotropic layer compound FeOCl from 57 Fe Mössbauer studies | SpringerLink Mostly, in solid or in frozen solution, both the isotropic and anisotropic hyperfine interaction contributes to the experimental spectrum. Allg. Cartesian coordinate is written as. 31(1980)249; S. Kikkawa, F. Kanamaru and M. Koizumi, Inorg. In Fig. Rend. AB INITIO STUDY OF ISOTROPIC AND ANISOTROPIC HYPERFINE INTERACTIONS IN PHOSPHORANYL AND PHOSPHORANE ANION RADICALS RENE A. J. JANSSEN and HENK M. BUCK Department of Organic Chemistry, Eindhoven University of Technology, Eindhoven 5600 MB (The Netherlands) (Received 15 March 1984) ABSTRACT A detailed ab initio study of isotropic and anisotropic hyperfine couplings … In general the HFI will be anisotropic due to the dipolar interaction, except for systems where the anisotropic part is averaged out (e.g. The red spheres are oxygen nuclei, the larger dark gray spheres are carbon nuclei, and the smaller light gray spheres are protons. de Chimie Miner. USA 76(1979)939; S. Ofer, I. Nowik and S.G. Cohen, in:Chemical Applications of Mössbauer Spectroscopy, ed. : Atomic Energy Research Establishment, Harwell, Eng. J. Rouxel and P. Palvadeau, Rev. Phys. OSTI.GOV Journal Article: Anisotropic hyperfine interactions of xenon nuclei surrounding a copper atom M. Eibschutz and S. Shtrikman, J. App. P.J. In the case of systems with large g anisotropy, the interaction may be called a pseudo-contact shift or other pseudo-type interaction [ 5 ]. are distinctive, when all ions are high spin, with Mn. Annalisa Brodu. Such indirect addressing of the nuclear spins via coupling to an electron allows us to create nuclear spin gates whose operational time is significantly faster than conventional direct addressing methods. This paradigm of control has important applications for spin based solid-state quantum information processing. (b) A malonic acid molecule. Immediate online access to all issues from 2019. 11(1972)229. Notes. L. Asch 1, B. D. Dunlap 2, R. Marquardt 3, W. Potzel 4, F. J. Litterst 4, G. D. Werner 3, F. Weigel 3, J. C. Spirlet 5 & G. M. Kalvius 4 Hyperfine Interactions volume 40, pages 279 – 282 (1988)Cite this article. hyperfine interaction and anisotropic hyperfine interaction. Res. R.H. Herber and Y. Maeda, Physica 99B(1980)352. cals (the anisotropic hyperfine interaction). E. Kostiner and J. Steger, J. 19(1982)317; G.A. Japan 52(1979)963. Chem. DOI: 10.1063/1.1731715. 199 ff and references therein. 51(1984)17. 3(1971)273. See, for example: E.R. 265 ff. The Hamiltonian term of anisotropic hyperfine structure interaction is expressed as ϰ = g e g N β e β N 3 S → . I hereby declare that I am the sole author of this thesis. hyperfine interaction for tin atoms in intermetallides may be highly anisotropic. Hyperfine Interactions and Slow Spin Dynamics in Quasi-isotropic InP-based Core/Shell Colloidal Nanocrystals. r 5 S 1 x S 2 x þ r 2 3 y 2. ðÞ. Rev. Origin of the Anisotropic Part of the Hyperfine Interaction. Res. Artman, Phys. Franc. A very simple example of a strongly anisotropic hyperfine interaction is that of the V OH center [1,2] shown in Fig. The EPRspectra of hydrogen atoms trapped in xenon and krypton at 10 K have been reinvestigated. A-2) and r the distance between the two spins (in m), considered to be located at a single point in space (point dipole approximation) and connected by the vector r. The dipole-dipole interaction depends on the relative orientation of the magnetic moments and is thus anisotropic. We have measured the isotropic and anisotropic hyperfine splittings for di-tert-butyl nitroxide (DTBN) and 2,2,6,6-tetramethylpiperidine N-oxyl (TMPN) perturbed by molecular complex formation, by hydrogen bonding, and by solvent effects in aprotic solvents. System Utilizing Anisotropic Hyper ne Interactions by Yingjie Zhang A thesis presented to the University of Waterloo in ful llment of the thesis requirement for the degree of Master of Science in Physics Waterloo, Ontario, Canada, 2010 c Yingjie Zhang 2010. if the electron spin is located in a molecular orbital with a nod at the nucleus (p-, d- or f-orbitals). R. Bannwart, Ph.D. thesis, Rutgers University (1986); R. Bannwart, M. Croft and R.H. Herber, to be published. Debye Institute for Nanomaterials Science, Utrecht University, 3584 CC Utrecht, The Netherlands. 23(1974)1, and references therein. The important point is that this Fermi contact value has NO physical meaning at all. Halbert, D.C. Johnston, L.E. Japan 55(1982)3138. L.J. Soc. The resulting EPR spectrum consists of four lines centered about giso and split by aiso. C15(1982)317; See also J.M.P. Res. A. Salmon, Y. Maeda and R.H. Herber, unpublished results. 465(1980)147; ibid. [9]. Solid State Chem. anisotropic hyperfine interactions in magnetic cobalt metalloid compounds. Anisotropic Interactions always complicate things (solids, frozen solutions, membranes etc.) The anisotropy of the magnetic hyperfine field H hf, and the angular dependence of the quadrupole splitting ν q are measured in an NMR study of a fully magnetized single-crystal sphere of ferromagnetic hcp Co. For M--> rotation in a (1̄21̄0) plane it is found that H hf =H 0 +H'[(3 2 ψ-1)2], ν q =ν rel q +ν' q [(3 2 ψ-1)2], where ψ is the angle between M--> and the c axis. Phys. For anisotropic hyperfine interactions, powder line shapes are observed for the individual lines as discussed for the g anisotropy. Abstract. 58(1935)6. Anisotropic hyperfine interactions and spin relaxation in neptunyl salts. The problem is of matrix dimensions that have to be considered in the hyperfine term. The spin density at the nucleus is then induced by mechanisms like configuration interactions or spin polarization. 3B(1971)678. Status Solidi A18(1973)215. Chem. Solid State Chem. I didn't had any course on hyperfine interactions and now I am having trouble in solving the Anisotropic Hyperfine Hamiltonian. R.H. Herber, Accounts of Chemical Research 15(1982)216, and references therein. Chem. I hereby declare that I am the sole author of this thesis. This leads to an interesting interplay between isotropic and anisotropic hyperfine interactions. Bauminger, S.G. Cohen, S. Ofer and E.A. 1.1.1 Isotropic hyperfine structure. The dipolar integrals have been calculated using Slater-type orbitals. Anisotropic magnetic field effects arising from hyperfine interactions have recently been observed experimentally . Herber, R.H., Salmon, A. Hyperfine interactions in the anisotropic layer compound FeOCl from57Fe Mössbauer studies. From the angular dependences of EPR‐spectra of the 2 S 1/2 ‐state system Pb 2+ in CaWO 4 an anisotropic hyperfine interaction with the 207 Pb nucleus is inferred. J.M. The Journal of Chemical Physics 1961, 34 (4) , 1161-1175. By using only analytical methods, we are able to show how the interaction strength depends on important physical parameters, such as curvature and isotope abundances. The intrinsic hyperfine tensors of Mn. (Paris) B275(1972)911. S. Kikkawa, J. ... Hyperfine refers to interaction of a metal nucleus with “its own” unpaired electron spin density. 51(1984)17. Fe(III) below the magnetic ordering temperature in the PC material is shown to be consistent with the superparamagnetism of small particles in those samples. Chem. Coherent Control of Two Nuclear Spins Using the Anisotropic Hyperfine Interaction Yingjie Zhang, Colm A. Ryan, Raymond Laflamme, and Jonathan Baugh Phys. We have studied the effect of anisotropic hyperfine interactions on the electron spin resonance (ESR) spectra of alkyl radicals trapped in polycrystalline matrices. Halbert and J.C. Scanlon, Mat. McCandlish, A.H. Thompson, J.C. Scanlon and J.A. Learn more about Institutional subscriptions. The anisotropy broadens some or all of the hfs components, thus complicating the spectra. Anisotropic hyperfine interaction is also called dipolar interaction or dipole–dipole interaction. 16 (1981)1055. These oscillations are sensitive to the strength and the direction of an external magnetic field via the electron Zeeman interaction and the anisotropic components of the hyperfine and dipolar interactions. (11,28) These interactions can govern the spin dynamics when inter-radical interactions, such as the dipolar and exchange interactions, are small (29) or mutually balanced. Rev. https://doi.org/10.1007/BF02394104, Over 10 million scientific documents at your fingertips, Not logged in The EPR spectra of hydrogen atoms trapped in xenon and krypton at 10 K have been reinvestigated. Soc. 92(1980)1015, International Ed. 107, 170503 – Published 17 October 2011 See Viewpoint: Nuclear Spins Tango to the Tune of an Electron It has also been tested against exact quantum mechanical calculations for systems with anisotropic hyperfine interactions. 20 resolved hyperfine peaks, with little g anisotropy, and the hyperfine interactions are readily measured in X-band CW-EPR due to them being large (couplings are of order 250 MHz or more). This center in MgO consists of a linear defect 2OAHO2 in which a cation vacancy A separates a paramagnetic … Hyperfine Interactions interaction leads to resolved hyperfine splitting of the ESR. the magnitude of hyperfine interactions on 57 Fe nuclei in alloys of this system. H. Schafer-Stahl, Inorg. Isotropic superfine interaction is also known as Fermi contact interaction. Miedema, Adv. The persistence in the spectra of the paramagnetic doublet due to h.s. Grant, H. Wiedersich, R.M. 15(1976)2195. IV. Determination and Interpretation of the Hyperfine Matrix. de Jongh and A.R. Abstr. If the hyperfine interaction is larger than other unresolved contributions to the ESR line width, the hyperfine splitting is resolved in the ESR of localised centres in the solid state. R.H. Herber (Plenum, New York, 1984) pp. Bull. 39(1968)997. 373(1981)28. Goldanskii and R.H. Herber (Academic Press, New York, 1968) ch. Annalisa Brodu. Both isotropic and anisotropic hyperfine interactions involving the α and β nitrogen atoms are considered. They are based on the interaction of the PCs and nuclei through their magnetic moments as isotropic and anisotropic hyperfine interactions or electron dipolar interactions. Seances Acad. The hyperfine term of the Hamiltonian for a free radical in which one unpaired electron interacts with one nucleus consists of an isotropic part arising from the Fermi contact interaction and an anisotropic part due to electron-nuclear dipole interaction. Technische Hochschule Zürich. System Utilizing Anisotropic Hyper ne Interactions by Yingjie Zhang A thesis presented to the University of Waterloo in ful llment of the thesis requirement for the degree of Master of Science in Physics Waterloo, Ontario, Canada, 2010 c Yingjie Zhang 2010. F. Hulliger,Structural Chemistry of Layer-type Phases, ed. OSTI Identifier: We propose a method for completely controlling a nuclear spin subsystem using only microwave irradiation of resolved anisotropic hyperfine interactions with a single electron spin. These effects (g-factor, hyperfine coupling, zero field splitting, exchange coupling) in an atom or molecule may not be the same for all orientations of an unpaired electron in an external magnetic field. The four allowed transitions are shown in the energy level diagram. From the angular dependences of EPR‐spectra of the 2 S 1/2 ‐state system Pb 2+ in CaWO 4 an anisotropic hyperfine interaction with the 207 Pb nucleus is inferred. The coupling between the electron and nuclear spin results in a splitting of each electron spin state into 4 levels. The hyperfine coupling constant in isotropic interactions is denoted 'a'. anisotropic hyperfine interactions. R.H. Herber and Y. Maeda, Inorg. These interactions can be evaluated by where H iso, H ani, and H NQR represent the isotropic and anisotropic hyperfine interactions, and the nuclear quadrupole interaction, respectively. 5.1, for which g is almost isotropic. Problems See more in Physics. Solid State Chem. Purely dipolar interaction is expected e.g. As an example, we may cite the data for Sn impurity atoms in cubic Laves phases of the type RAl,, where R denotes a rare-earth element.' @article{osti_878281, title = {Hyperfine Sublevel Correlation (HYSCORE) Spectra for Paramagnetic Centers with Nuclear Spin I = 1 Having Isotropic Hyperfine Interactions}, author = {Maryasov, Alexander G and Bowman, Michael K}, abstractNote = {It is shown that HYSCORE spectra of paramagnetic centers having nuclei of spin I=1 with isotropic hfi and arbitrary NQI consist of ridges having zero width. One proton has been knocked off by x-ray irradiation, to leave a radical electron localized at the central carbon-13 nucleus. We have studied the effect of anisotropic hyperfine interactions on the electron spin resonance (ESR) spectra of alkyl radicals trapped in polycrystalline matrices. MW irradiation causes transitions between levels with ΔmS = ± 1 and ΔmI = 0 (only the electron spin is affected by the microwave irradiation). Read "Anisotropic Transferred Hyperfine Interaction in a Heavy-Fermion Compound: Paramagnetic NMR Line Shift in a CeCu6 Single Crystal, Journal of Low Temperature Physics" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. - 173.236.243.136. Solid State Chem. Anisotropic Hyperfine Interactions in the ESR Spectra of Alkyl Radicals. Line shapes can yield information about, for example, rates of chemical reactions. 27 It has not however been tested for systems in which both anisotropic interactions and electron-spin coupling are present. ADS Metrics details. First, itwas clear thatone needed a quantita-tivetheory ofthesehyperfine splittings to in-terpret virtually anyparamagnetic resonance spectrum in a condensed system where the motion of the organic molecule is restricted. 2 The NZI of the Cu2+ ions is much smaller than the HFI and thus neglected in the drawing. Correspondence to The RPM-mediated MFEs emerge from anisotropic hyperfine interactions between the radicals’ electron spins and associated nuclei. 14(1979)415. 1.1.1 Isotropic hyperfine structure Isotropic superfine interaction is also known as Fermi contact interaction. anisotropic hyperfine interactions in magnetic cobalt metalloid compounds. T.R. Cu spin degrees of freedom are sensed through a strong anisotropic hyperfine coupling. The anisotropic layer compound FeOCl has been synthesized by two different techniques to give, respectively, a large single crystal blade-like product (SC) and a polycrystalline powder product (PC), each of which was examined by temperature dependent57Fe Mössbauer spectroscopy over the range 4.2≤T≤300 K. In particular, the onset of magnetic ordering on sample cooling (near 90 K) has been studied in detail, in the light of the 2-dimensional ordering of the paramagnetic ion spins in the crystallographica, c plane. The anisotropic hyperfine interaction allows entanglement of two nuclear spins using microwave pulses. A method has been developed to estimate the dipolar hyperfine interaction for 19 F in fluorinated radicals based on INDO theory. U.S. Bureau of Mines, USBM RI 8420 (see Chem. For a given set of anisotropic hyperfine interactions, the only additional parameters are the rocking angle and the rate constant. The effects of anisotropic hyperfine interactions on the recombination reactions of spin correlated radical pairs in a weak applied magnetic field are discussed in the context of the radical pair mechanism (RPM). V.I. The high temperature (∼300 K) and low temperature (∼4.2 K) Mössbauer parameters for the SC and PC material are identical within experimental error. For anisotropic hyperfine interactions, powder line shapes are observed for the individual lines as discussed for the g anisotropy. Article In this intermediate medium the anisotropic hyperfine interactions are only partially averaged out by molecular motions. options for initialization and control [58]. by molecular motion in solution). Natl. JavaScript has been disabled in your browser, Civil, Environmental and Geomatic Engineering, Humanities, Social and Political Sciences, Information Technology and Electrical Engineering. Abstract. Anisotropic hyperfine interaction in the manganese(III) hexaaqua ion Research output : Contribution to journal › Letter › Research › peer-review Presentation Google Scholar. A.J. R. Schollhorn, Angew. The hyperfine coupling constant of a nucleus is directly related to the spectral line spacing and, in the simplest cases, is essentially the spacing itself. A. Adam and G. Buisson, Phys. The anisotropy broadens some or all of the hfs components, thus complicating the spectra. Department of Chemistry, Rutgers, The State University, 08903, New Brunswick, NJ, USA, You can also search for this author in 4: Energy level diagram and resulting EPR spectrum for a spin system with one electron S = 1/2 and a nucleus I = 3/2 with isotropic electron Zeeman ( g iso ) and hyperfine ( a iso ) interactions. F. Levy (Reidel, Boston, 1976) pp. From: fiona.,at,.rsc.anu.edu.au (Dr Fiona Bettens); Subject: Anisotropic Hyperfine Summary; Date: Fri, 9 May 1997 20:16:39 +1000: Fri, 9 May 1997 20:16:39 +1000 Picone, K. Haneda and A.H. Morrish, J. Phys. We investigate a simple radical-pair model with one axially anisotropic hyperfine interaction using both analytical and numerical calculations. Y. Maeda, M. Yamashita, H. Ohshio, N. Tsutsumi and Y. Takashima, Bull. Tax calculation will be finalised during checkout. II /Mn. The probability of ψ(0) means 1s electron can interact with nucleus only when it exists inside proton !