Strongly coupled electronic, magnetic, and lattice degrees of freedom in LaC o5 under pressure

Academic Article

Abstract

  • ©2015 American Physical Society. We have performed high-pressure magnetotransport and x-ray diffraction measurements on ferromagnetic LaCo5, confirming the theoretically predicted electronic topological transition driving the magnetoelastic collapse seen in the related compound YCo5. Our x-ray diffraction results show an anisotropic lattice collapse of the c axis near 10 GPa that is also commensurate with a change in the majority charge carriers evident from high-pressure Hall effect measurements. The coupling of the electronic, magnetic, and lattice degrees of freedom is further substantiated by the evolution of the anomalous Hall effect, which couples to the magnetization of the ordered state of LaCo5.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Stillwell RL; Jeffries JR; McCall SK; Lee JRI; Weir ST; Vohra YK
  • Volume

  • 92
  • Issue

  • 17