Effect of Pressure on the Electronic state in Eu-Divalent EuTIn4 (T: Ni, Pd, Pt, Au) Compounds

We grew single crystals of Eu-divalent antiferromagnets EuTIn4 (T: Ni, Pd, Pt, Au) by the In-self flux method, with the constitution of Eu:T:In 1.1:1:30. Single crystals are characteristic in shape, being long along the orthorhombic [100] direction. We measured the electrical resistivity, specific h...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-03, Vol.592 (1), p.12047
Main Authors: Hedo, M, Hiranaka, Y, Nakamura, A, Tomori, K, Honda, F, Haga, Y, Harima, H, Matsubayashi, K, Uwatoko, Y, Nakama, T, Ōnuki, Y
Format: Article
Language:English
Subjects:
Antiferromagnetism
De Haas-Van Alphen effect
Electrical resistivity
Electron states
Gold
Magnetic permeability
Magnetic structure
Nickel compounds
Palladium
Physics
Platinum
Pressure effects
Single crystals
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Summary:We grew single crystals of Eu-divalent antiferromagnets EuTIn4 (T: Ni, Pd, Pt, Au) by the In-self flux method, with the constitution of Eu:T:In 1.1:1:30. Single crystals are characteristic in shape, being long along the orthorhombic [100] direction. We measured the electrical resistivity, specific heat, magnetic susceptibility, and de Haas-van Alphen effect for these compounds, together with the electrical resistivity under pressure for EuTIn4 (T: Ni, Pd, Pt). Under pressure, the Eu-divalent electronic state is often changed into the Eu-trivalent state, revealing the valence transition. In the present experiments, the valence transition was, however, not observed even at high pressures up to 8 GPa for these compounds, but a sharp resistivity drop was observed just below the Néel temperature under pressure. This is most likely due to a change of the magnetic structure.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/592/1/012047