Uniaxial pressure dependence of magnetic order in partially frustrated CePdAl
The metallic heavy-fermion compound CePdAl might be a model system to investigate the influence of magnetic frustration on quantum criticality. The antiferromagnetic order below 2.7K can be suppressed to 0 by applying hydrostatic or chemical pressure. Due to the arrangement of Ce ions on a distorted Kagomé lattice in the basal plane, geometric magnetic frustration is present. Neutron scattering experiments reveal, that only two thirds of the Ce ions participate in long-range magnetic order whereas the other third remains mainly disordered. Applying uniaxial pressure within the basal plane modifies the exchange interactions and thus might lift the frustration. Moreover, effects of different magnetic domain population are expected. In a previous measurement under constant uniaxial stress, remarkable changes in magnetic intensity were observed. It shall be investigated, how uniaxial pressure can tune the degree of frustration and how it influences the stability of magnetic order in CePdAl.
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LUCAS Stefan; FRITSCH Veronika; SCHMALZL Karin and STOCKERT Oliver. (2016). Uniaxial pressure dependence of magnetic order in partially frustrated CePdAl. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-41-893
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