Double Resonance. Some Applications of Paramagnetic Resonance

Al'Tshuler, S. A.; Kozyrev, B. M.

doi:10.1016/b978-1-4832-0053-8.50013-4

Cited by 29 publications

(61 citation statements)

References 91 publications

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“…Group theory predicts that for lower symmetry cases the negative q components are required [2,3,4]. For this purpose, the extended Stevens (ES) operators, which include both the positive and negative q components, have been defined and their transformation properties worked out [19].…”

Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

“…The usual Stevens operators [1,2] in EMR studies [27,28] and to a lesser extend in the crystal field theory and superposition model analysis [29,30,31]. Group theory predicts that for lower symmetry cases the negative q components are required [2,3,4].…”

Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

“…triclinic, site symmetry the spin Hamiltonian, including the Zeeman electronic (Ze) terms and ZFS ones in the ES operators notation [3,19,32], is defined by [1][2][3][4][5]: …”

Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

“…The standard range 0 ≤ λ ≤ 1/3 corresponds [9] in terms of the diagonal components of the conventional ZFS D tensor (S.D.S) [11,12] to ¨D XX¸ ≤ ¸D YY¸ ≤¸D ZZ¸, whereas -1/3 ≤ λ ≤ 0 corresponds [10] to ¸D YY¸ < ¨D XX¸ ≤ ¸D ZZ¸. Hence, the former (later) convention is equivalent to choosing the direction of the maximum overall splitting of an EPR spectrum as the Z axis and that A c c e p t e d m a n u s c r i p t 2 of the minimum as the X axis (Y axis) [13,14,15,16]. The convention 0 ≤ λ ≤ 1/3 is mostly used in EMR studies of transition-metal ions [17].…”

Section: Introductionmentioning

confidence: 99%

“…The concept underlying EMR (electron magnetic resonance, which encompasses EPR/ESR (electron paramagnetic/spin resonance) spectroscopy [1,2] is the spin Hamiltonian (SH) -for a review, see, e.g. Refs 3, 4.…”

Section: Introductionmentioning

confidence: 99%

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Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Kripal

Yadav

Gnutek

et al. 2009

Journal of Physics and Chemistry of Solids

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Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

“…triclinic, site symmetry the spin Hamiltonian, including the Zeeman electronic (Ze) terms and ZFS ones in the ES operators notation [3,19,32], is defined by [1][2][3][4][5]: …”

Section: Basic Nomenclature and Theoretical Aspectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Kripal

Yadav

Gnutek

et al. 2009

Journal of Physics and Chemistry of Solids

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Orbital order, anisotropic spin couplings, and the spin-wave spectrum of the ferromagnetic Mott insulator YTiO3

et al. 2005

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Dedicated to Bernhard Mühlschlegel on the occasion of his 80th birthdayUsing a point-charge calculation of the electrostatic crystal field, we determine the non-degenerate orbital ground state of the ferromagnetic Mott insulator YTiO3, which is found to agree perfectly with experiment. Based on the orbital order, we obtain by perturbation theory an effective spin Hamiltonian that describes the magnetic superexchange between nearest-neighbor Ti ions. The superexchange Hamiltonian includes, in addition to the isotropic Heisenberg coupling, antisymmetric (Dzyaloshinskii-Moriya) and symmetric anisotropy terms, caused by the spin-orbit interaction on the Ti ions. We find ferromagnetic Heisenberg couplings for Ti-Ti bonds in the crystallographic ab planes, but antiferromagnetic ones for Ti-Ti bonds between planes, in contradiction with experiment (which gives ferromagnetic couplings for both). Difficulties in calculating realistic values for the isotropic couplings of YTiO3 have been already reported in the literature. We discuss possible origins for these discrepancies. However, the much smaller values we obtain for the symmetric and antisymmetric anisotropies may be expected to be reliable. We therefore combine the experimentally-deduced isotropic coupling with the calculated anisotropic ones to determine the magnetic order of the Ti ions, which is found to be in satisfactory agreement with experiment. Based on this magnetic order, we derive the spin-wave spectrum. We find an acoustic branch with a very small zone-center gap and three optical spin-wave modes with sizeable zone-center gaps. The acoustic branch reproduces the one reported in experiment, and the optical ones are in a satisfactory agreement with experiment, upon a proper folding of the magnetic Brillouin zone.

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The EPR of monoclinic KY(WO₄)₂ single crystal doped with Sm³⁺ ion

Borowiec¹,

Prokhorov

Dyakonov

et al. 2009

Physica Status Solidi (b)

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The electron paramagnetic resonance (EPR) of Sm3+ ion in KY(WO4)2 single crystal was investigated at T = 4.2 K using an X‐band spectrometer. The observed resonance absorption represents the complex superposition of three spectra corresponding to samarium isotopes with different nuclear moment. The EPR spectrum is characterised by a strong g ‐factor anisotropy. The temperature dependences of the g ‐factor were shown to be caused by strong spin–orbital and orbital–lattice coupling. The resonance lines become broader as temperature increases due to the short spin–lattice relaxation time. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Double Resonance. Some Applications of Paramagnetic Resonance

Cited by 29 publications

References 91 publications

Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Orbital order, anisotropic spin couplings, and the spin-wave spectrum of the ferromagnetic Mott insulator YTiO3

The EPR of monoclinic KY(WO₄)₂ single crystal doped with Sm³⁺ ion

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Double Resonance. Some Applications of Paramagnetic Resonance

Cited by 29 publications

References 91 publications

Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Alternative zero-field splitting (ZFS) parameter sets and standardization for Mn2+ ions in various hosts exhibiting orthorhombic site symmetry

Orbital order, anisotropic spin couplings, and the spin-wave spectrum of the ferromagnetic Mott insulator YTiO3

The EPR of monoclinic KY(WO4)2 single crystal doped with Sm3+ ion

Contact Info

Product

Resources

About

The EPR of monoclinic KY(WO₄)₂ single crystal doped with Sm³⁺ ion