Colossal magnetodielectric effect and spin flop in magnetoelectric Co{sub 4}Nb{sub 2}O{sub 9} crystal
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031 (China)
We have investigated the detailed magnetic, magnetoelectric (ME), magnetodielectric (MD) and thermal expansion properties in Co{sub 4}Nb{sub 2}O{sub 9} crystal. A magnetic-field-induced spin flop was observed below antiferromagnetic (AFM) transition temperature T{sub N}. Dielectric constant at applied magnetic field nearly diverges around the AFM transition, giving rise to a colossal MD effect as high as ∼138% around T{sub N}. Theoretical analysis of the ME and MD data revealed a major contribution of critical spin fluctuation to the colossal MD effect in Co{sub 4}Nb{sub 2}O{sub 9}. These results suggest that linear ME materials with large ME coupling might be potentially used to realize large MD effect for future application.
- OSTI ID:
- 22594425
- Journal Information:
- Applied Physics Letters, Vol. 109, Issue 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
ATOMIC FORCE MICROSCOPY
COBALT COMPOUNDS
CRYSTALS
DIELECTRIC MATERIALS
FLUCTUATIONS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
NIOBATES
PERMITTIVITY
SPIN
THERMAL EXPANSION
TRANSITION TEMPERATURE