Journal
PHYSICAL REVIEW B
Volume 90, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.184424
Keywords
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Funding
- DESY, Germany under DST-DESY project
- CSIR, India
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We report the appearance of ferroelectricity below T-S = 18 K, at which short-ranged spiral spin orders, suggesting that MnCr2O4 is an improper multiferroic material. Linear heat capacity data and zero-field-cooled memory effect verify reentrant spin-glass-like state below T-S. Synchrotron x-ray diffraction studies confirm significant magnetoelastic coupling at long-range ferrimagnetic order (T-N = 42 K) and at T-S. We argue that the release of topological spin frustration, produced due to pyrochlore structure of Cr sublattice, is manifested through the significant magnetoelastic effect at T-N and T-S and holds the key for spiral spin order driven ferroelectricity in MnCr2O4.
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