期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.136402
关键词
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资金
- U.S. Department of Energy, Division of Materials Sciences [DE-FG02-07ER46453]
- National Science Foundation [NSF DMR 08-56321]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0856321] Funding Source: National Science Foundation
We present temperature-dependent x-ray diffraction and temperature-and field-dependent Raman scattering studies of single-crystal Mn3O4, which reveal the magnetostructural phases that evolve in the spinels due to the interplay between strong spin-orbital coupling, geometric frustration, and applied magnetic field. We present evidence that the magnetoelastic and magnetodielectric behavior in this material is governed by magnetic-field-controlled tetragonal-to-monoclinic phase changes. Most interestingly, for an applied field transverse to the ferrimagnetic ordering direction, H parallel to [1 (1) over bar 10], we find evidence for a field-tuned quantum phase transition to a tetragonal spin-disordered phase, indicating that a structurally symmetric, spin frustrated phase can be recovered at T similar to 0 for intermediate transverse fields in Mn3O4.
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