Spin-lattice coupling in a ferrimagnetic spinel: Exotic H-T phase diagram of MnCr2S4 up to 110 T
Spin-lattice coupling in a ferrimagnetic spinel: Exotic H-T phase diagram of MnCr2S4 up to 110 T
Miyata, A.; Suwa, H.; Nomura, T.; Prodan, L.; Felea, V.; Scurschii, I.; Deisenhofer, J.; Krug Von Nidda, H.-A.; Portugall, O.; Zherlitsyn, S.; Tsurkan, V.; Wosnitza, J.; Loidl, A.
In antiferromagnets, the interplay of spin frustration and spin-lattice coupling has been extensively studied as the source of complex spin patterns and exotic magnetism. Here, we demonstrate that, although neglected in the past, the spin-lattice coupling is essential to ferrimagnetic spinels as well. We performed ultrahigh-field magnetization measurements up to 110 T on a Yafet-Kittel ferrimagnetic spinel, MnCr2S4, which was complemented by measurements of magnetostriction and sound velocities up to 60 T. Classical Monte Carlo calculations were performed to identify the complex high-field spin structures. Our minimal model incorporating spin-lattice coupling accounts for the experimental results and corroborates the complete phase diagram, including two new high-field phase transitions at 75 and 85 T.Magnetoelastic coupling induces striking effects: An extremely robust magnetization plateau is embedded between two unconventional spin-asymmetric phases. Ferrimagnetic spinels provide a new platform to study asymmetric and multiferroic phases stabilized by spin-lattice coupling.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
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Physical Review B 101(2020), 054432
DOI: 10.1103/PhysRevB.101.054432
Cited 16 times in Scopus -
Contribution to WWW
arXiv:1911.12103 [cond-mat.str-el]: https://arxiv.org/abs/1911.12103
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Permalink: https://www.hzdr.de/publications/Publ-30796