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

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

2001-07-04

arxiv.org/abs/cond-mat/0107075v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published in J.Phys.Soc.Jpn

Scientific paper

10.1143/JPSJ.70.2876

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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