並列タイトル等ESR of diluted antiferromagnet Rb2CocMg1-cF4
一般注記We measured ESR in single crystals of Rb2CocMg1-cF4(C=0.6, 0.7) which magnetically diluted a two-dimensional Ising spin antiferromagnet Rb2CocF4. C=0.6 is compound just above the percolation limit (C=0.593). ESR measurements have been performed two kinds of angles parallel and perpendicular. The frequency was 120 GHz, the temperature was 4.2~100K. When Hllc-axis and C=06, we observed absorption with g=6.6. This absorption is based on a single spin. The temperature dependence of the line width of this absorption showed abnormalities about 20 K and 31 K. This result was in agreement with the result of Neutron Diffraction and μ SR, respectively. It is thought that a certain magnetic order has occurred at such temperature. When C=0.7, the possible reason for this was not because of the single was weak. When H?c-axis and C=0.6, C=0.7, we observed absorption with g=2.96, g=2.80, respectively. These results were not observed as abnormalities of line width by magnetic order.
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連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）