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Low Temperature Structural Instability of Tetragonal Spinel Mn3O4
- Issue Date
- 3월-2013
- Publisher
- PHYSICAL SOC JAPAN
- Keywords
- structural instability; geometrical frustration; ferrimagnet
- Citation
- JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, v.82, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- Volume
- 82
- Number
- 3
- ISSN
- 0031-9015
- Abstract
- Tetragonal ferrimagnetic spinel Mn3O4 shows complex magnetic phase transitions due to competing antiferromagnetic interactions involving Mn2+/3+ ions with difference valences. Using magnetization and neutron diffraction measurements, we propose that its tetragonal lattice possesses an instability towards orthorhombic distortion in zero field well below T-N. The direction of the observed instability suggests that the anomaly is related to lifting of the persistent geometrical frustration via spin-lattice coupling.
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