3 years ago

Phase diagram of URu2-xFexSi2 in high magnetic fields [Physics]

Phase diagram of URu2-xFexSi2 in high magnetic fields [Physics]
David Graf, M. Brian Maple, Andrew Gallagher, Sheng Ran, John Singleton, Noravee Kanchanavatee, Ryan E. Baumbach, Kuan-Wen Chen, Naveen Pouse, Alexander J. Breindel, Kevin Huang, Inho Jeon

Electrical transport measurements were performed on URu2 − xFexSi2 single-crystal specimens in high magnetic fields up to 45 T (DC fields) and 60 T (pulsed fields). We observed a systematic evolution of the critical fields for both the hidden-order (HO) and large-moment antiferromagnetic (LMAFM) phases and established the 3D phase diagram of T–H–x. In the HO phase, H/H0 scales with T/T0 and collapses onto a single curve. However, in the LMAFM phase, this single scaling relation is not satisfied. Within a certain range of x values, the HO phase reenters after the LMAFM phase is suppressed by the magnetic field, similar to the behavior observed for URu2Si2 within a certain range of pressures.

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