磁阻钌铜酸盐RuSr2Nd1 .8- xY0 .2CexCu2 O_{10-δ}的MuSR研究（x = 0.95和0.80）
A MuSR study of the magnetoresistive ruthenocuprates RuSr2Nd1.8-xY0.2CexCu2O_{10-δ} (x = 0.95 and 0.80)
摘要：
利用零场μ子自旋弛豫（ZF-μSR）方法研究了欠掺杂巨磁阻材料RuSr_2Nd_1.8-xY_0.2CexCu_2O_（10-d）（x = 0.95，0.80）的磁特性.结果表明，在钌的自旋转变温度，TRu的初始不对称性A0的逐渐损失。在同一时间的电子弛豫速率，λ显示出一个逐渐增加的温度低于TRu。这些结果已被解释为铜自旋团簇形成TRU以下的证据。这些磁有序的团簇随着温度的降低而生长，从而导致初始不对称性缓慢降低。在所研究的材料中，在很宽的温度范围内观察到GMR，并且随着温度从TRu降低到4K，其幅度增加，这表明Cu自旋团簇尺寸与-MR之间的关系。
英文摘要：
Zero field muon spin relaxation (ZF-μSR) has been used to study the magnetic properties of the underdoped giant magnetoresistive ruthenocuprates (GMR) RuSr2Nd1.8-xY0.2CexCu2O10-d (x = 0.95, 0.80). The results show a gradual loss of initial asymmetry A0 at the ruthenium spin transition temperature, TRu. At the same time the electronic relaxation rate, lambda shows a gradual increase with decreasing temperature below TRu. These results have been interpreted as evidence for Cu spin cluster formation below TRu. These magnetically ordered clusters grow as the temperature is decreased thus causing the initial asymmetry to decrease slowly. GMR is observed over a wide temperature range in the materials studied and the magnitude increases as the temperature is reduced from TRu to 4 K which suggests a relation between Cu spin cluster size and -MR.
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