Transverse and Longitudinal Magnetic-Field Responses in the Ising Ferromagnets URhGe, UCoGe and UGe2

Abstract

The field dependence of the electronic specific heat gamma(H) of URhGe is determined using temperature-dependent magnetization measurements and Maxwell's relation for all three orthorhombic directions. A large (40 %) enhancement of gamma(H) is found at the reorientational transition for fields applied along the b hard axis, which we argue occurs when the field-induced moment is of the same size as the zero-field ordered moment M0. Fields applied along the easy direction, on the other hand, lead to a rapid suppression of gamma(H). We emphasize that this behavior is also applicable to the closely related ferromagnetic superconductors UCoGe and UGe2 and discuss implications for the novel field-induced/enhanced superconductivity in these materials.

arXiv comment4 pages, 4 figures

References in corpus (8)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Pressure dependence of the magnetization in the ferromagnetic superconductor UGe_2
• Extremely Large and Anisotropic Upper Critical Field and the Ferromagnetic Instability in UCoGe
• Tricritical point and wing structure in the itinerant ferromagnet UGe2
• Unusual upper critical field of the ferromagnetic superconductor UCoGe
• Field Re-entrant Superconductivity Induced by the Enhancement of Effective Mass in URhGe
• Paramagnetic limiting in ferromagnetic superconductors with triplet pairing
• Ferromagnetic Quantum Critical Fluctuations and Anomalous Coexistence of Ferromagnetism and Superconductivity in UCoGe Revealed by Co-NMR and NQR Studies

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