Emergent 1/3 magnetization plateaus in pyroxene CoGeO$_3$
| Autor: | Liu Tjeng, A. Gukasov, X. Fabrèges, Alexander C. Komarek, A. Melendez Sans, M. Baenitz, D. I. Khomskii, L. Zhao, Hanjie Guo |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Magnetic structure Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Neutron diffraction FOS: Physical sciences Spin structure Square lattice Magnetization Condensed Matter - Strongly Correlated Electrons Domain wall (magnetism) Ferromagnetism Antiferromagnetism Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Physical Review Research |
| DOI: | 10.48550/arxiv.2109.07367 |
| Popis: | Despite the absence of an apparent triangular pattern in the crystal structure, we observe unusually well pronounced 1/3 magnetization plateaus in the quasi one-dimensional Ising spin chain compound CoGeO$_3$ which belongs to the class of pyroxene minerals. We succeeded in uncovering the detailed microscopic spin structure of the 1/3 magnetization plateau phase by means of neutron diffraction. We observed changes of the initial antiferromagnetic zero-field spin structure that are resembling a regular formation of antiferromagnetic "domain wall boundaries", resulting in a kind of modulated magnetic structure with 1/3-integer propagation vector. The net ferromagnetic moment emerges at these "domain walls" whereas two third of all antiferromagnetic chain alignments can be still preserved. We propose a microscopic model on the basis of an anisotropic frustrated square lattice to explain the observations. |
| Databáze: | OpenAIRE |
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