Cu-substitution effects on the magnetic properties of weak itinerant electron ferromagnet CrAlGe

• Published in: AIP advances Vol. 8; no. 10; pp. 101426 - 101426-4
• Main Authors: Masumitsu, Hayato, Yoshinaga, Soshi, Mitsui, Yoshifuru, Umetsu, Rie Y., Hiroi, Masahiko, Uwatoko, Yoshiya, Koyama, Keiichi
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 01-10-2018; AIP Publishing LLC
• Subjects: Copper; Curie temperature; Ferromagnetism; Lattice parameters; Magnetic properties; Magnetism; Materials substitution; Ternary alloys; Titanium compounds
• ISSN: 2158-3226; 2158-3226
• DOI: 10.1063/1.5043105

Cu-substitution effects on ferromagnetism in Cr-base ternary alloy CrAlGe with an orthorhombic TiSi2-type structure was investigated. The lattice parameters of Cr0.95Cu0.05AlGe were a = 4.748 Å, b = 8.209 Å and c = 8.696 Å at room temperature. The spontaneous and effective moment were determined to be ps = 0.533 μB/f.u at 5 K and peff = 1.89 μB/f.u, respectively. The Curie temperature TC was estimated to be 108 K. These ps and TC of Cr0.95Cu0.05AlGe were larger than those of CrAlGe and Ti-substituted compound. The peff/ps was determined to be 3.55, which was smaller than that of CrAlGe and Ti-substituted compound. Obtained results suggest that the substitution of Cu for Cr in CrAlGe leads suppression of its weak itinerant electron ferromagnetism.