ESR of CuO Particles in a Bi<SUB>2</SUB>(Sr, Ca)<SUB>3</SUB>Cu<SUB>2</SUB>O<I><SUB>y</SUB></I> Crystal
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ESR measurements were performed at the X-band for a Bi<SUB>2</SUB>(Sr, Ca)<SUB>3</SUB>Cu<SUB>2</SUB>O<I><SUB>y</SUB></I> crystal over the temperature range from 77 K to room temperature, and a clear ESR line of superparamagnetic particles of CuO was observed with the external field of <I>ca.</I> 3 kOe. The resonance field of the absorption peak became a minimum at 230 K, at which point the absorption intensity became a maximum. Furthermore, an anisotropy of the resonance field was observed for another broad absorption. Possible interpretations for the results are discussed in terms of magnetic anisotropies in CuO particles.
- 公益社団法人 応用物理学会の論文
公益社団法人 応用物理学会 | 論文
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