Magnetic-Field Switching of Crystal Structure in an Orbital-Spin-Coupled System: MnV{sub 2}O{sub 4}

Journal Article · Fri Nov 04 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.197202· OSTI ID:20699542

Adachi, K; Suzuki, T ^[1]; Kato, K; Takata, M ^[2]; Osaka, K ^[2]; Katsufuji, T ^[1]

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1. Department of Physics, Waseda University, Tokyo 169-8555 (Japan)
2. JASRI/SPring-8, Hyogo 679-5198 (Japan)

We studied the magnetic and structural properties of spinel MnV{sub 2}O{sub 4}, which has S=5/2 spin with no orbital degrees of freedom on the Mn{sup 2+} site and S=1 spin and three orbital degrees of freedom on the V{sup 3+} site. We found that the ferrimagnetic ordering at T{sub N}=56.5 K and the structural phase transition at T{sub s}=53.5 K are closely correlated in this compound and found a switching of crystal structure between cubic and tetragonal phases by the magnetic field. This phenomenon can be explained by the coupling between orbital and spin degrees of freedom in the t{sub 2g} states of the V site.

• OSTI ID: 20699542
• Journal Information: Physical Review Letters, Vol. 95, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.95.197202; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
DEGREES OF FREEDOM
FERRIMAGNETIC MATERIALS
L-S COUPLING
MAGNETIC FIELDS
MANGANESE COMPOUNDS
MANGANESE IONS
PHASE TRANSFORMATIONS
SPIN
SPINELS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TRANSITION TEMPERATURE
VANADATES
VANADIUM IONS