Tricritical point of the f-electron antiferromagnet USb2 driven by high magnetic fields

Article

关键词: CYLINDRICAL FERMI SURFACES;    NEUTRON-DIFFRACTION;    PHASE-TRANSITIONS;    URANIUM;    ANISOTROPY;    SUPERCONDUCTIVITY;    TEMPERATURE;    PNICTIDES;    DIAGRAM;    ORDER;   

DOI  :  10.1103/PhysRevB.95.014414

来源: SCIE

【 摘 要 】

In pulsed magnetic fields up to 65 T and at temperatures below the Neel transition, our magnetization and magnetostriction measurements reveal a field-induced metamagneticlike transition that is suggestive of an antiferromagnetic to ferrimagnetic ordering. Our data also suggest a change in the nature of this metamagneticlike transition from second-to first-order-like near a tricritical point at T-tc similar to 145K and H-c similar to 52 T. At high fields for H > H-c we found a decreased magnetic moment roughly half of the moment determined by neutron powder diffraction. We propose that the decreased moment and lack of saturation at high fields indicate the presence of a field-induced ferrimagnetic state above the tricritical point of the H-T phase diagram for USb2.

【 授权许可】

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