LARGE MAGNETOVOLUME EFFECT IN YTTRIUM DOPED LA-CA-MN-O PEROVSKITE
LARGE MAGNETOVOLUME EFFECT IN YTTRIUM DOPED LA-CA-MN-O PEROVSKITE
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DOI：
10.1103/physrevlett.75.3541
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发表时间：
1995-11-06
影响因子：
8.6
通讯作者：
GARCIA, J
中科院分区：
文献类型：
--
作者：
IBARRA, MR;ALGARABEL, PA;GARCIA, J
对 La0.60Y0.07Ca0.33MnO3 锰氧化物多晶进行交流初始磁化率、热膨胀和磁致伸缩测量。我们观察到自发体积磁贡献（在 T-C = 160 +/- 5 K 时相当于 1 X 10(-3)）。由于金属 (M)-绝缘体 (I) 转变，这种额外贡献在 T-C 时急剧下降，并且在施加磁场下受到抑制。这表明向 M 态的转变是由 I 区的场引起的，产生强磁弹性效应。目前的结果证明了该化合物的磁弹性和磁输运性质之间的密切关系。
ac initial magnetic susceptibility, thermal expansion, and magnetostriction measurements were performed on a polycrystal of La0.60Y0.07Ca0.33MnO3 manganese oxide. We observed a spontaneous volume magnetic contribution (congruent to 1 X 10(-3) at T-C = 160 +/- 5 K). This extra contribution sharply decreases at T-C as a consequence of the metal (M)-insulator (I) transition, and is suppressed under an applied magnetic field. This shows that the transition to the M state is induced by the field in the I regime, producing strong magnetoelastic effects. The present results demonstrate the close relationship between magnetoelastic and magnetotransport properties in this compound.