2017/09/01 by Shota Nakamura, Toshiro Sakakibara, Yusei Shimizu +5 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Ferromagnetism #Ising model #Magnetic field #Magnetization #Phase (matter) #Phase diagram #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Transition point #Tricritical point #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.96.094411
10 pages, 11 figures, accepted for publication in Phys. Rev. B
arxiv created 2017/09/01 · openalex publication_date 2017/09/11 · openalex created_date 2017/09/15 · arxiv updated 2017/10/11 · openalex updated_date 2026/08/05
The ferromagnetic quantum phase transition (FMQPT) in clean metals has attracted much interest since a first-order transition is commonly observed. The orthorhombic Ising ferromagnet URhGe provides an excellent opportunity to study the FMQPT, because its Curie temperature can be tuned to zero by applying a magnetic field H parallel to the b axis, perpendicular to the spontaneous moment that aligns along the c axis. Here, the authors perform high-precision angle-resolved magnetization measurements on URhGe to investigate the FMQPT with H applied near the b axis. They find a clear first-order transition below a tricritical point (TCP) located above 4 K, and determine the detailed profiles of the wing structure of the first-order transition in the T-Hb-Hc phase diagram. The obtained wing structure is consistent with the theoretical expectation that three second-order transition lines merge tangentially at TCP.