Magnetic Resonance of CoCr_2O_4 and MnCr_2O_4
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概要
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Magnetic resonance of single crystals of CoCr_2O_4 and MnCr_2O_4 was studied below the Curie point (T_c) at various microwave frequencies. In CoCr_2O_4, cancellation of angular momenta was discovered at 82.5°K (T_J). Anomalies were also detected at 24.5°K (T_s), above which satellite reflections are not observed in neutron diffraction, and to 10.5° K (T_I), below which a deviation from proper conical spin structure is expected to appear due to the local instability. At higher temperatures, the resonance frequency, ω, dose not depend linearly on the external field, H. The magnitude of molecular field coefficient was estimated to be 2.8∼3.5×10^4 gram from the ω-H relationship assuming a collinear ferrimagnetic structure, structure, which agrees with the value derived from the paramagnetic Curie point. In MnCr_2O_4, the anomalies corresponding to T_I and T_J were not found. Resonance behavior between T_s(18°K) and T_c is understood as that of a simple ferrimagnet.
- 社団法人日本物理学会の論文
- 1970-11-05
著者
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Funahashi Satoru
Japan Atomic Energy Research Institute
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Siratori Kiiti
Department Of Physics Osaka University
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Siratori Kiiti
Department Of Physics Faculty Of Science Osaka University
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TOMONO Yuzo
Institute for Solid State Physics, University of Tokyo
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Tomono Yuzo
Institute For Solid State Physics The University Of Tokyo
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