Skip to main content
Open Access Publications from the University of California

Physical properties of EuPtIn4intermetallic antiferromagnet

  • Author(s): Rosa, PFS
  • De Jesus, CBR
  • Fisk, Z
  • Pagliuso, PG
  • et al.

We report the physical properties of EuPtIn4single crystalline platelets grown by the In-flux technique. This compound crystallizes in the orthorhombic Cmcm structure with lattice parameters a=4.542(1)A., b=16.955(2)A. and c=7.389(1)A. Measurements of magnetic susceptibility, heat capacity, electrical resistivity, and electron spin resonance (ESR) reveal that EuPtIn4is a metallic Curie-Weiss paramagnet at high temperatures with an effective moment ofμeff≈7.8(1)μBdue to divalent Eu ions. At low temperatures, antiferromagnetic (AFM) ordering is observed atTN=13.3K followed by a successive anomaly atT=12.6K. In addition, within the magnetic state, a spin-flop transition is observed withHc~2.5T at T=1.8 K when the magnetic field is applied along the ac-plane. In the paramagnetic state, a single divalent Eu2+Dysonian ESR line with a Korringa relaxation rate of b=4.1(2)Oe/K is observed. Interestingly, even at high temperatures, both ESR linewidth and electrical resistivity reveal a similar anisotropy. We discuss a possible common microscopic origin for the observed anisotropy in these physical quantities likely associated with an anisotropic magnetic interaction between Eu2+4f electrons mediated by conduction electrons. © 2014 Elsevier B.V.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View