Unusual Meissner state of the superconducting ferromagnet UCoGe revealed by differential susceptibility measurements with a polycrystalline sample

UCoGe is a ferromagnet with a Curie temperature TC∼3K at ambient pressure and superconductivity appears within the ferromagnetic phase with a superconducting transition temperature TSC∼0.8K. We have investigated magnetic properties of the ferromagnetic superconductor UCoGe in superconducting states...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 470; no. SUP1; pp. S575 - S576
Main Authors Deguchi, K., Ban, S., Osaki, E., Satoh, I., Sato, N.K.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.12.2010
Elsevier
Subjects
Coexistence of superconductivity and ferromagnetism
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Differential susceptibility
Exact sciences and technology
Inhomogeneous superconductivity
Magnetic properties
Physics
Properties of type I and type II superconductors
Superconductivity
Uranium-based magnetic superconductor
Inhomogeneous superconductivity
Differential susceptibility
Coexistence of superconductivity and ferromagnetism
Uranium-based magnetic superconductor
Curie point
Superconducting transitions
Superconductivity
Magnetic field effects
Ferromagnetic materials
Polycrystals
Magnetic hysteresis
Actinide alloys
Coexistence
Meissner effect
Magnetic susceptibility
Germanium alloys
Magnetic superconductors
Uranium alloys
Ferromagnetism
Cobalt alloys
Transition element alloys
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Summary:UCoGe is a ferromagnet with a Curie temperature TC∼3K at ambient pressure and superconductivity appears within the ferromagnetic phase with a superconducting transition temperature TSC∼0.8K. We have investigated magnetic properties of the ferromagnetic superconductor UCoGe in superconducting states by the differential susceptibility measurements with a polycrystalline sample. We observed unusual diamagnetic signals for magnetic field dependence of the differential susceptibility in superconducting state. We have revealed the sharp peak for the butterfly-shaped hysteresis loop of ferromagnetism observed even in Meissner state and point out the possible coexistence of ferromagnetism and superconductivity inhomogeneously in real space.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2010.01.029