CePdSb: A possible ferromagnetic Kondo-lattice system.
CePdSb: A possible ferromagnetic Kondo-lattice system.
复制标题
CePdSb：一种可能的铁磁近藤晶格系统。
DOI：
10.1103/physrevb.43.6295
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Adroja
中科院分区：
文献类型：
--
作者：
Malik;Adroja
在4.2—300 K的温度范围内对CePdSb和GdPdSb进行了磁化率和电阻率测量。结果表明，CePdSb的有序温度（{ital T}{sub {ital M}}）为17 K，而GdPdSb的反铁磁有序温度（{ital T}{sub {ital N}}）为15.5 K。在顺磁状态下，CePdSb的磁化率在50 ~ 300 K之间遵循居里-魏斯行为，但在50 K以下偏离居里-魏斯行为。在4.2 K时，其每单位饱和磁矩为1.2{mu}{下标B}}，由Ce{sup 3+}离子的自由离子值2.14{mu}{下标B}}降低而来。在高温下，CePdSb的电阻率表现为ln({ital T})，表明晶体电场和近藤效应对4{ital f}矩的综合影响。因此，CePdSb似乎是一个具有铁磁有序铈矩的近藤晶格系统。
Magnetic-susceptibility and electrical-resistivity measurements on CePdSb and GdPdSb have been carried out in the temperature range of 4.2--300 K. The measurements reveal that CePdSb orders ferromagnetically with an ordering temperature ({ital T}{sub {ital M}}) of 17 K while GdPdSb orders antiferromagnetically with a Neel temperature ({ital T}{sub {ital N}}) of 15.5 K. In the paramagnetic state, the susceptibility of CePdSb follows Curie-Weiss behavior between 50 and 300 K but deviates from it below 50 K. Its saturation magnetic moment per formula unit at 4.2 K is 1.2{mu}{sub {ital B}}, which is reduced from the free-ion value of 2.14{mu}{sub {ital B}} for the Ce{sup 3+} ion. The resistivity of CePdSb shows a broad maximum at about 150 K and a ln({ital T}) behavior at high temperatures, indicating the combined influence of crystalline electric fields and Kondo effect on the 4{ital f} moments. Thus CePdSb appears to be a Kondo-lattice system with ferromagnetic ordering of the cerium moments.