Low-temperature X-ray diffraction, transport properties, specific-heat, thermal expansion and magnetic investigations of SmCu<sub>2</sub>
作者:E Gratz、N Pillmayr、E Bauer、H Muller、B Barbara、M Loewenhaupt
DOI:10.1088/0953-8984/2/6/008
日期:1990.2.12
variety of physical properties (low-temperature X-ray diffraction, electrical resistivity, thermal conductivity, thermopower, specific heat, thermal expansion and susceptibility) of orthorhombic SmCu2 have been studied. A significant contribution of the J=5/2 Hund ground state has been observed. An estimation of the overall crystal-field splitting obtained from the termal expansion experiment yields
已经研究了正交晶系 SmCu2 的各种物理特性(低温 X 射线衍射、电阻率、热导率、热电势、比热、热膨胀和磁化率)。已经观察到 J=5/2 Hund 基态的显着贡献。从热膨胀实验中获得的整体晶体场分裂的估计值为 110 K。磁熵表明双基态,因为观测值 (Sm=5.50+or-0.2 J mol-1 K-1 ) 非常接近理论 R ln 2。在电阻率和磁化率结果中可以看到 J=7/2 多重峰的额外影响。在磁振子热导率的框架内讨论了磁有序区域(尼尔温度 TN = 23 K)中热导率的显着增加。