title: Sign of canted ferromagnetism in the quasicrystal approximants Au-SM-R (SM = Si, Ge and Sn / R = Tb, Dy and Ho).
abstract: Magnetic susceptibility and magnetization of the quasicrystal approximants Au-SM-R (SM = Si, Ge or Sn / R = Gd, Tb, Dy or Ho) are investigated. Ferromagnetic transitions are observed in all of these compounds, in contrast to the spin-glass behavior reported in similar compounds, Ag-In-R (R = Eu, Gd, Tb or Dy). Au-SM-Gd (SM = Si, Ge or Sn) exhibit a simple ferromagnetic transition at 22.5, 13 and 9 K, respectively, whereas Au-Si-(Tb, Dy or Ho) show indications of a canted ferromagnetic transition at 8.3, 5.9 and 3.8 K, respectively. The latter are attributed to a crystal electric field effect that is absent in the Gd-bearing compounds. The ferromagnetic behavior in Au-SM-R may be understood to be a consequence of the short R-R distances compared to those for Cd-R and Ag-In-R.
authors.affiliation: Department of Materials Science and Technology, Tokyo University of Science, Niijuku, Tokyo 125-8585, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hiroto
authors.forename: K
authors.initials: K
authors.lastname: Tokiwa
authors.forename: R
authors.initials: R
authors.lastname: Tamura
mesh_terms: D018360:Crystallography, X-Ray; D004419:Dysprosium / Q000737:chemistry; D005857:Germanium / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D006695:Holmium / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D059346:Magnets / Q000737:chemistry*; D008956:Models, Chemical; D008958:Models, Molecular; D015394:Molecular Structure; D012825:Silicon / Q000737:chemistry; D013324:Strontium / Q000737:chemistry; D013725:Terbium / Q000737:chemistry
chemical_list: D028581:Lanthanoid Series Elements; D005857:Germanium; D013725:Terbium; D004419:Dysprosium; D006046:Gold; D006695:Holmium; D013324:Strontium; D012825:Silicon