Cooperative Phenomenon of Ferromagnetism and Unconventional Superconductivity in UGe${}_2$: A ^73^Ge-NQR Study under Pressure

Abstract

We report on a cooperative phenomenon of ferromagnetism and unconventional superconductivity (SC) in UGe${}_2$ through the measurements of ${}^{73}$Ge nuclear-quadrupole-resonance (NQR) under pressure ($P$). The NQR spectra evidenced phase separation into ferromagnetic and paramagnetic phases in the vicinity of $P_c\sim 1.5$ GPa, pointing to a first-order transition. The measurements of nuclear-spin-lattice-relaxation-rate $1/T_1$ revealed that SC emerges under the background of ferromagnetism, but not of the paramagnetic phase.

arXiv comment4 pages, 5 figures, submitted to J. Phys. Soc. Jpn

References in corpus (4)

• Pressure dependence of the magnetization in the ferromagnetic superconductor UGe_2
• Magnetic Properties of a Pressure-induced Superconductor UGe${}_2$
• Evidence for Uniform Coexistence of Ferromagnetism and Unconventional Superconductivity in UGe_2: A ^73Ge-NQR Study under Pressure
• Pressure-induced Superconductivity in a Ferromagnet UGe${}_2$ -- Resistivity Measurements in Magnetic Field --

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• Superconductivity at the Pressure-Induced Ferromagnetic Critical Region in UCoGe
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