Magnetic properties of the Zr(Cr 1− xNi x) 2 alloys and their hydrides

• Published in: Journal of magnetism and magnetic materials Vol. 119; no. 1; pp. L15 - L20
• Main Authors: Blazina, Z., Drasner, A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.1993; Elsevier Science
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Metals. Metallurgy; Physics; Saturation moments and magnetic susceptibilities; Chromium Nickel Zirconium Alloys; Transition metal Alloys; Faraday effect; Paramagnetism; Chemical composition; Ferromagnetism; Hydrogenation; Low temperature; Magnetic properties; Magnetic susceptibility
• ISSN: 0304-8853
• DOI: 10.1016/0304-8853(93)90497-P

The magnetic susceptibility has been measured by the Faraday method on the alloys Zr(Cr 1− x Ni x ) 2 and their hydrides over the temperature range 4.2–300 K and in applied fields up to 1.5 T. All the systems investigated were found to exhibit paramagnetism. The Pauli paramagnetism of ZrCr 2 is enhanced by the substitution of chromium by nickel or by hydrogenation. In the ternary region, besides the Pauli paramagnetism a contribution to the total susceptibility associated either with the presence of a ferromagnetic phase or with a Curie-Weiss type of paramagnetism was observed. The ferromagnetic contribution at low nickel concentrations is attributed to solute nickel atoms in the ZrCr 2 matrix, while the Curie-Weiss behaviour at higher nickel concentrations is associated with the antiferromagnetically coupled magnetic moments in the nickel sublattice. Hydrogen absorption acts in favour of these effects. The magnetic behaviour of the systems Zr(Cr 1− x Ni x ) 2-H y is compared with the related systems Zr(Cr 1− x Fe x ) 2-H y and Zr(Cr 1− x Co x ) 2-H y and briefly discussed.