Enhanced susceptibility in LNiO3 perovskites ( L = La,Pr,Nd,Nd0.5Sm0. 5)
Enhanced susceptibility in LNiO3 perovskites ( L = La,Pr,Nd,Nd0.5Sm0. 5)
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LNiO3 钙钛矿的磁化率增强（L = La,Pr,Nd,Nd0.5Sm0.5）
DOI：
10.1103/physrevlett.84.526
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发表时间：
2000
影响因子：
8.6
通讯作者：
Bukowski
中科院分区：
文献类型：
--
作者：
Zhou;Goodenough;Dabrowski;Klamut;Bukowski
对高氧压下合成的高质量LNiO3 （L = La,Pr,Nd,Nd0.5Sm0.5）样品，测量了电阻率rho(T)和直流磁化率chi(T)的温度依赖性。减去稀土对chi(T)的贡献，可以表示NiO3阵列的磁化率随带宽的减少从泡利到居里-魏斯顺磁性的演变。当L = Pr和Nd时，在温度T(T) = T(N)处发生的金属-绝缘体转变是一阶的；当L = Nd0.5Sm0.5时，在T(T) >T(N)处chi(-1)(T)不产生异常。在反铁磁域T中
The temperature dependence of the resistivity rho(T) and of the dc magnetic susceptibility chi(T) were measured on high-quality LNiO3 (L = La,Pr,Nd,Nd0.5Sm0.5) samples synthesized under high oxygen pressure. Subtraction of the rare-earth contribution to chi(T) allows the presentation of the evolution of the susceptibility of the NiO3 array from Pauli to Curie-Weiss paramagnetism with decreasing bandwidth. A metal-insulator transition occurring at a temperature T(t) = T(N) is first order for L = Pr and Nd; it becomes second order and produces no anomaly in chi(-1)(T) at a T(t)>T(N) for L = Nd0.5Sm0.5. In the antiferromagnetic domain T