Mössbauer study on the magnetic field-induced insulator-to-metal transition in perovskite Eu0.6Sr0.4MnO3 |
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| Authors: | Shin Nakamura Masami Sato Shotaro Morimoto Saburo Nasu Yorihiko Tsunoda |
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| Affiliation: | (1) Department of Science and Engineering, Teikyo University, Utsunomiya 320-8551, Japan;(2) Advanced Research Institute of Science and Engineering, Waseda University, Shinjuku-ku Tokyo 169-8555, Japan;(3) Graduate School of Engineering Science, Osaka University, Toyonaka Osaka, 560-8531, Japan;(4) Radioisotope Research Center, Osaka University, Toyonaka Osaka, 560-0043, Japan;(5) School of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan |
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| Abstract: | We have investigated the spin dynamics of a distorted perovskite Eu0.6Sr0.4MnO3 by means of Mössbauer spectroscopy. Below 70 K the exchange interaction grows gradually, and below 42 K the spins turn into a cluster glass state. The magnetic field-induced insulator-to-metal (IM) transition at low temperature is a transition from cluster glass to ferromagnet. The induced metallic phase seems to be still in non-uniform electronic state. On the other hand, at 80 K, just above T c of the induced ferromagnet, a metamagnetic transition was observed. |
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| Keywords: | Eu0.6Sr0.4MnO3 magnetic field-induced insulator-to-metal transition cluster glass ferromagnet metamagnetic transition |
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