Collapse of valence transition in Yb0.8Y0.2InCu4: pressure-induced weak ferromagnetism.
Collapse of valence transition in Yb0.8Y0.2InCu4: pressure-induced weak ferromagnetism.
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Yb0.8Y0.2InCu4 中价态跃迁的崩溃：压力诱导的弱铁磁性。
DOI：
10.1103/physrevlett.88.137204
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发表时间：
2002
影响因子：
8.6
通讯作者：
H. Wada
中科院分区：
文献类型：
--
作者：
A. Mitsuda;T. Goto;K. Yoshimura;W. Zhang;N. Sato;K. Kosuge;H. Wada
研究了Yb0.8Y0.2InCu4的磁化强度随温度降至0.6K、压力升至1.2 Gpa、磁场升至9T时的变化规律。在0.8 Gpa时，价态跃迁崩塌和铁磁有序几乎同时发生。1.2 Gpa的铁磁性相具有1.7K的低居里温度和0.05微米(B)/Yb的极小有序矩。屏蔽有序矩的某些效应可能在铁磁性和价态转变中起着关键作用。
We investigated the magnetization of Yb0.8Y0.2InCu4 as a function of temperature down to 0.6 K, pressure up to 1.2 GPa, and magnetic field up to 9 T. The valence transition temperature of Yb0.8Y0.2InCu4 is lowered with applying pressure. At 0.8 GPa, collapse of the valence transition and ferromagnetic ordering occur almost simultaneously. The ferromagnetic phase at 1.2 GPa is characterized by a low Curie temperature of 1.7 K and an extremely small ordered moment of 0.05 micro(B) per Yb. Some effect of screening the ordered moment may play a key role in the ferromagnetism and the valence transition.