Magnetic field induced anomalous Core-Shell magnetic behavior in short-rod Co3O4 |
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| Institution: | 1. Institute of Solar Energy, Shanghai University of Electric Power, Shanghai, 200090, China;2. Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai, 200240, China;1. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;2. Department of Chemistry, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea |
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| Abstract: | It is found that both spinel structure inversion and the Néel temperature of short-rod Co3O4 are dependent on the applied magnetic field. Spinel structure inversion induced by the applied field results in the change of uncompensated surface spins. Thus, the shell magnetic behavior of short-rod Co3O4 is also field-dependent, which shows ferrimagnetism (FIM) under the low field and antiferromagnetism (AFM) in a high field. This changing shell magnetic behavior leads to anomalous Core-Shell magnetic behavior, that Néel temperature (∼28 K) disappears under the low field and appears again in a high field. |
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| Keywords: | Ferromagnetism Spinel structure inversion Core-Shell Néel temperature |
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