低温状態におけるLa-Co-Mn系酸化物の磁気的及び電気的性質
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概要
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LaCo_xMn_<1-3>O_3(x=0.0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0)compounds were prepared by commerical sintering technique in air and O_2 atmospheres at temperatures of 1100 to 1200℃. Magnetic and electric properties of the compounds were measured by means of inductance, vibrating sample magnetometer and four-electrode technique in the temperature range between 298 and 78 K, respectively. Saturation magnetization decreased monotonously with increasing the substitutional amount of Co ion for Mn ion. While, coercivity, remanence and Curie temperature increased with increasing Co up tox=0.5, and beyond this region, they decreased reversely with increasing Co substitute. Electric resistivity exponentially increased with lowering temperature, like behavior of semiconductor materials. The logarithmic values of the resistivity obeyed a linear-relation with reciprocal temperature.
- 社団法人日本セラミックス協会の論文
- 2001-08-01