Phase transition and critical behaviors of spin-orbital coupling spinel compound CdV{sub 2}O{sub 4}

Journal Article · Mon Mar 07 00:00:00 EST 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4941845· OSTI ID:22597007

Wang, Li; Sun, Duohua; Wang, Rongjuan; Xiong, Rui; Liu, Yong; Shi, Jing ^[1]; Zhu, Yuanyuan ^[2]; Lu, Zhihong ^[3]

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1. Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072 (China)
2. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031 (China)
3. School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081 (China)

The temperature dependent susceptibility and specific heat of spinel compound CdV{sub 2}O{sub 4} were investigated. The structural transition accompanied with orbital order appearing at 89.6 K is confirmed to be a first order transition, while the magnetic transitions at 30.2 K is revealed to be a second order one. For the paramagnetism-antiferromagnetic transition, the width of critical region was estimated to be about 1.5 K by differentiating with Gaussian fluctuation. In critical region, the critical behavior of specific heat was compared with renormalization-group theory. Critical exponent α and critical amplitude ratio (A{sup +}/A{sup −}) fitting to the data was found to be −0.017 and 1.26, respectively. The value of A{sup +}/A{sup −} shows the critical behavior of CdV{sub 2}O{sub 4}'s deviates from 3D-Heisenberg and shifts to 3D-XY. The analysis of specific heat in low temperature range gives out that Debye temperature Θ{sub D} for CdV{sub 2}O{sub 4} is estimated to be 190 K.

• OSTI ID: 22597007
• Journal Information: Journal of Applied Physics, Vol. 119, Issue 9; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CADMIUM OXIDES
COMPARATIVE EVALUATIONS
COUPLING
DEBYE TEMPERATURE
GAUSS FUNCTION
GROUP THEORY
PARAMAGNETISM
PHASE TRANSFORMATIONS
RENORMALIZATION
SPECIFIC HEAT
SPIN
SPINELS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
VANADIUM OXIDES
WIDTH