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Magnetic and transport properties of UPd2Sb

机译:UPd2Sb的磁性和输运性质

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A new compound UPd2Sb was prepared and studied by means of X-ray diffraction, magnetization, electrical resistivity, magnetoresistivity. thermoelectric power and specific heat measurements. The phase crystallizes with a cubic structure of the MnCu2Al-type (s.g. Fm (3) over barm). It orders antiferromagnetically at T-N = 55 K and exhibits a modified Curie-Weiss behaviour with reduced effective magnetic moment at higher temperatures. The electrical resistivity behaves in a manner characteristic of systems with strong electronic correlations, showing Kondo effect in the paramagnetic region and Kondo-like response to the applied magnetic field. The Seebeck coefficient exhibits a behaviour expected for scattering of conduction electrons on a narrow quasiparticle band near the Fermi energy. The low-temperature electronic specific heat in UPd2Sb is moderately enhanced being about 81 mJ/mol K-2. (c) 2005 Elsevier Ltd. All rights reserved.
机译:制备了一种新的化合物UPd2Sb,并通过X射线衍射,磁化强度,电阻率,磁阻系数进行了研究。热电功率和比热测量。该相以MnCu2Al型的立方结构结晶(例如,在barm上为Fm(3))。它在T-N = 55 K时反铁磁有序,并且表现出改进的居里-魏斯行为,在较高的温度下有效磁矩降低。电阻率具有强电子相关性的系统特性,表现出顺磁性区域的近藤效应和对施加磁场的类似近藤响应。塞贝克系数表现出预期的行为,用于在费米能量附近的窄拟粒子带上散射导电电子。 UPd2Sb中的低温电子比热适当提高,约为81 mJ / mol K-2。 (c)2005 Elsevier Ltd.保留所有权利。

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