CePdAl - a Kondo lattice with partial frustration

International Conference on Strongly Correlated Electron Systems 2016

Fritsch, Veronika^1 ; Lucas, Stefan^2 ; Huesges, Zita^2 ; Sakai, Akito^1 ; Kittler, Wolfram^3 ; Taubenheim, Christian^3 ; Woitschach, Sarah^2 ; Pedersen, Bjorn^4 ; Grube, Kai^5 ; Schmidt, Burkhard^2 ; Gegenwart, Philipp^1 ; Stockert, Oliver^2 ; Löhneysen, Hilbert V.^3,5

Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg

86135, Germany^1

Max Planck Institute for Chemical Physics of Solids, Dresden

01187, Germany^2

Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe

76131, Germany^3

Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universitat München, Garching

85748, Germany^4

Karlsruhe Institute of Technology, Institut für Festkörperphysik, Karlsruhe

76131, Germany^5

关键词: Conduction electrons;    Delocalizations;    Insulating system;    Kondo lattices;    Localized magnetic moments;    Magnetic frustrations;    Spin ice;    Spin liquids;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/807/3/032003/pdf
DOI  :  10.1088/1742-6596/807/3/032003

来源: IOP

【 摘 要 】

Magnetic frustration, which is well-defined in insulating systems with localized magnetic moments, yields exotic ground states like spin ices, spin glasses, or spin liquids. In metals magnetic frustration is less well defined because of the incipient delocalization of magnetic moments by the interaction with conduction electrons, viz., the Kondo effect. Hence, the Kondo effect and magnetic frustration are antithetic phenomena. Here we present experimental data of electrical resistivity, magnetization, specific heat and neutron diffraction on CePdAl, which is one of the rare examples of a geometrically frustrated Kondo lattice, demonstrating that the combination of Kondo effect and magnetic frustration leads to an unusual ground state.