#mu#~+SR studies on (Nd_(1-y)Am_y)_(0.5)Sr_(0.5)MnO_3

W. Higemoto; K. Nishiyama; I. Watanabe; K. Nagamine; A. Asamitsu; H. Kuwahara; Y. Tokura

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#mu#~+SR studies on (Nd_(1-y)Am_y)_(0.5)Sr_(0.5)MnO_3

机译：＃mu＃〜+ SR研究（Nd_（1-y）Am_y）_（0.5）Sr_（0.5）MnO_3

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The local magnetic fields and spin dynamics of the manganite (Nd_(0.125)Am_(0.875))_(0.52)Sr_(0.48)MnO_3 were studied using muon spin rotation/relaxation methods. In the paramagnetic phase, the relaxation time T_1 as a function of temperature was found to deviate from linearity below 300 K, indicating microscopic observation of antiferromagnetic instability above the feeromagnetic transitin temperature T_c. In the metastable ferromagnetic metallic phase, two different magnetically inequivalent interstitial muon sites were observed with hyperfine coupling constants, A_(hf), of -3.26 kG/#mu#_B and -1.27 kG/#mu#_B, which are nearly temperature independent above 20 K.

机译：利用μ子自旋/弛豫方法研究了锰矿（Nd_（0.125）Am_（0.875））_（0.52）Sr_（0.48）MnO_3的局部磁场和自旋动力学。在顺磁相中，发现弛豫时间T_1与温度成函数关系，在低于300 K时偏离线性，这表明微观观察到反铁磁不稳定性在高于铁磁传递温度T_c时。在亚稳态的铁磁金属相中，观察到两个不同的磁不等价的介子介子，其超精细耦合常数A_（hf）分别为-3.26 kG /＃mu＃_B和-1.27 kG /＃mu＃_B，几乎与温度无关20 K以上。

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来源
《Physica, B. Condensed Matter》 |1999年第0期|共2页
作者
W. Higemoto; K. Nishiyama; I. Watanabe; K. Nagamine; A. Asamitsu; H. Kuwahara; Y. Tokura;
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正文语种 eng
中图分类物理学;
关键词
manganite; colossal magnetoresistance; mu; ~+SR;

机译：忙啊你特;colossal magneto resistance;木;~+SR;

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1. #mu#~+SR studies on (Nd_(1-y)Am_y)_(0.5)Sr_(0.5)MnO_3 [J] . W. Higemoto, K. Nishiyama, I. Watanabe, Physica, B. Condensed Matter . 1999,第0期

机译：＃mu＃〜+ SR研究（Nd_（1-y）Am_y）_（0.5）Sr_（0.5）MnO_3
2. Specific heat at high temperature and magnetic measurements in Nd_(0.5)Sr_(0.5)MnO_3 and R_(0.5)Ca_(0.5)MnO_3 (R = Nd, Sm, Dy and Ho) samples [J] . J. Lopez, O. F. de Lima Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2004,第1a2期

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3. Structural phase transition in Pr_(0.55)Ca_(0.45)MnO_3 and Nd_(0.5)Sr_(0.5)MnO_3 associated with charge ordering transition [J] . T. Murata, T. Terai, T. Fukuda, Materials Science and Engineering . 2008,第3期

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#mu#~+SR studies on (Nd_(1-y)Am_y)_(0.5)Sr_(0.5)MnO_3

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