Kondo Effect in the Transport Properties of the CsCl-Type Compounds Fe1−xTi1+x. II. Magnetic Scattering Center due to Atomic Disordering

作者: K. Ikeda , T. Nakamichi , Y. Yamada , M. Yamamoto

DOI: 10.1002/PSSB.2220630136

关键词: Kondo effectCenter (category theory)Composition dependenceStoichiometryResidual resistivityChemistryScatteringCondensed matter physicsNeutron diffractionSuperparamagnetismCrystallography

摘要: Neutron diffraction measurements were made at room temperature for the CsCl-type compounds, Fe1−xTi1+x, in order to confirm origins of anomalous transport phenomena titanium-rich compositions and superparamagnetism near stoichiometric one. On basis those results, it could be concluded that former behaviour is due Kondo effect, originating a magnetic cluster nine iron atoms with concentration about 10−2, produced by atomic disorder. The composition dependence residual resistivity also seems explainable from this point view. Neutronenbeugungsmessungen wurden bei Zimmertemperatur fur die CsCl-Typ-Verbin-dungen Fe1−xTi1+x gemacht, um den Ursprung der anomalen Transporterscheinungen titanreichen Zusammensetzungen und des Superparamagnetismus Stochiometrie zu bestatigen. Aus diesen Resultaten konnte gefolgert werden, das jenes Verhalten durch Kondo-Effekt hervorgerufen wird, wobei magnetische Cluster von neun Eisen-Atomen mit einer Konzentration etwa 10−2 atomare Unordnung entstehen. Die Abhangigkeit Restwiderstands Zusammensetzung scheint diesem Standpunkt erklarbar sein.

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