Temperature dependence of magneto-optical Kerr signal in GeTe − Sb2Te3 topological superlattice
Source abstract
Abstract
In this report, we studied the temperature dependence of magneto-optical Kerr rotation in [(GeTe)2/(Sb2Te3)1]n=8 topological superlattice from room temperature to 440 K. At temperatures lower than a threshold temperature of 360 K, the Kerr signal was negligible. On the other hand, at temperatures higher than the threshold, two resonant Kerr peaks with a mirror-symmetry for one field scan from + 20 to – 20 kOe were observed. We found that the resonant field of each Kerr signal peak is gradually decreased with increasing the temperature, while its magnitude is increased. We further found that a phase transition from the high temperature phase to a low temperature phase can be controlled by an external magnetic field.
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Research context
OpenAlex topics: Topological Materials and Phenomena · Phase-change materials and chalcogenides · Photorefractive and Nonlinear Optics
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Affiliations
Toyota Technological Institute 1 , 2-12-1 Hisakata, Tempaku, Nagoya 468-8511, Japan
Japan Science and Technology Agency 2 CREST, , 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
Institute of Materials Science 3 , VAST, 18 Hoang Quoc Viet, Hanoi, Vietnam
National Institute of Advanced Industrial Science and Technology (AIST) 4 Nanoelectronics Research Institute, , Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, 305-8565, Japan
Funding
Core Research for Evolutional Science and Technology, Japan Science and Technology Agency
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