Abstract
We have studied the effect of geometrical frustration on the antiferromagnetic order in the Yb-based triangular lattice compound YbCuGe below TN = 4.2 K by the measurements of magnetization and specific heat under hydrostatic and uniaxial pressures. By applying hydrostatic pressure P up to 1.34 GPa, TN hardly changes. By contrast, TN increases as P is applied along the hexagonal a axis, while TN decreases by the application of P along the c axis. The increase of TN only for P‖a suggests the release of the frustration inherent in the triangular lattice of Yb ions of this compound.
Highlights
Cerium (Ce)-based and Ytterbium (Yb)-based intermetallic compounds have a great deal of interest in the field of magnetism because they exhibit a variety of physical behaviors, such as an anomalous magnetic ordering, superconductivity, and non-Fermi-liquid behavior due to the competition between the Kondo effect and the Ruderman-KittelKasuya-Yosida (RKKY) interaction [1,2]
This study, reveal uniaxial the magnetic wepressures have measured the magnetic susceptibility and specific heat under uniaxial and hydrostatic pressures plied along the a axis, the magnetic frustration should be released due to the P
YbCuGe with TN = 4.2 K, we have studied the response of the magnetic susceptibility and specific heat to uniaxial and hydrostatic pressures
Summary
Cerium (Ce)-based and Ytterbium (Yb)-based intermetallic compounds have a great deal of interest in the field of magnetism because they exhibit a variety of physical behaviors, such as an anomalous magnetic ordering, superconductivity, and non-Fermi-liquid behavior due to the competition between the Kondo effect and the Ruderman-KittelKasuya-Yosida (RKKY) interaction [1,2]. In CePdAl below TN = 2.7 K, one-third of Ce ions remain in a paramagnetic state due to the geometrical frustration of the quasikagome lattice [9] Another example is a heavyfermion compound CePt6 Al3 in which Ce atoms form a honeycomb lattice in a trigonal basal plane [13]. The broad maximum of the magnetic spe χ = M/B above 100 K for both Bkc and Bka follows the Curie-Weiss law expected for the heat at 50YbKion is reproduced a Schottky anomaly by the model. This compo trivalent [18].
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