Impurity and defect induced variation of hall effect and magnetoresistivity of the heavy fermion systems CeCu2Si2 and CeCu6

✍ Scribed by G. Adrian; H. Adrian

• Publisher: Elsevier Science
• Year: 1987
• Weight: 207 KB
• Volume: 148
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(87)90149-5

✦ Synopsis

Measurements of the Hall effect RH(T ) and magnetoresistivity Ap(B, T) of thin films of CeCu2Si 2 and CeCu 2 reveal strong temperature dependences which are at low temperatures due to the existence of heavy fermions and of the formation of a coherent state. Introducing lattice disorder by means of heavy ion irradiation or alternatively by substituting Ce by La leads to a sensitive suppression of these characteristic heavy fermion features, resulting in a continuation of the high temperature behaviors to lower temperatures, These are supposed to originate in case of Ru(T ) from single impurity skew scattering and in case of Ap(B, T) from the dependence of the scattering cross-section of the conduction electrons on the partial alignment of localized magnetic moments in an external field.