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Magnetic Properties of a Pressure-induced Superconductor UGe$_2$

N. Tateiwa·K. Hanazono·T. C. Kobayashi·K. Amaya·T. Inoue·K. Kindo·Y. Koike·N. Metoki·Y. Haga·R. Settai·Y. Onuki
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Abstract

We performed the DC-magnetization and neutron scattering experiments under pressure {\it P} for a pressure-induced superconductor UGe$_2$. We found that the magnetic moment is enhanced at a characteristic temperature {\it T}$^{*}$ in the ferromagnetic state, where {\it T}$^{*}$ is smaller than a Curie temperature {\it T}$_{\rm C}$. This enhancement becomes remarkable in the vicinity of {\it P}$_{\rm C}^{*}$ = 1.20 GPa, where {\it T}$^{*}$ becomes 0 K and the superconducting transition temperature {\it T}$_{\rm SC}$ shows a maximum. The characteristic temperature {\it T}$^{*}$, which decreases with increasing pressure, also depends on the magnetic field.

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N. Tateiwa, K. Hanazono, T. C. Kobayashi, K. Amaya, T. Inoue, K. Kindo, Y. Koike, N. Metoki, Y. Haga, R. Settai, Y. Onuki. 2001-07-04. Magnetic Properties of a Pressure-induced Superconductor UGe$_2$. https://doi.org/10.1143/jpsj.70.2876

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