Effect of the Lattice and Spin-Phonon Contributions on the Temperature Behavior of the Ground State Splitting of Gd{sup 3+} in SrMoO{sub 4}

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418020117· OSTI ID:22771440

Gorlov, A. D., E-mail: [e-mail] ^[1]

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1. Institute of Natural Sciences and Mathematics of Ural Federal University (Russian Federation)

The temperature behavior of the EPR spectra of the Gd{sup 3+} impurity center in single crystals of SrMoO{sub 4} in the temperature range T = 99–375 K is studied. The analysis of the temperature dependences of the spin Hamiltonian b{sub 2}{sup 0}(T) = b{sub 2}(F) + b{sub 2}(L) and P{sub 2}{sup 0}(T) = P{sub 2}(F) + P{sub 2}(L) (for Gd{sup 157}) describing the EPR spectrum and contributing to the Gd{sup 3+} ground state splitting ΔE is carried out. In terms of the Newman model, the values of b{sub 2}(L) and P{sub 2}(L) depending on the thermal expansion of the static lattice are estimated; the b{sub 2}(F) and P{sub 2}(F) spin-phonon contributions determined by the lattice ion oscillations are separated. The analysis of b{sub 2}{sup 0}(T) and P{sub 2}{sup 0}(T) is evidence of the positive contribution of the spin-phonon interaction; the model of the local oscillations of the impurity cluster with close frequencies ω describes well the temperature behavior of b{sub 2}(F) and P{sub 2}(F).

• OSTI ID: 22771440
• Journal Information: Physics of the Solid State, Vol. 60, Issue 2; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON SPIN RESONANCE
GADOLINIUM 157
GADOLINIUM ADDITIONS
GADOLINIUM IONS
GROUND STATES
HAMILTONIANS
IMPURITIES
INTERACTIONS
MOLYBDATES
MONOCRYSTALS
OSCILLATIONS
PHONONS
SPECTRA
SPIN
STRONTIUM COMPOUNDS
TEMPERATURE DEPENDENCE
THERMAL EXPANSION