Magnetostriction and thermal expansion of interstitially modified NdFe10V2Zx (Z = N, H) compounds

• Published in: Journal of alloys and compounds Vol. 468; no. 1-2; pp. 11 - 14
• Main Authors: ALINEJAD, M. R, TAJABOR, N, KHANDAN FADAFAN, H, FRUCHART, D, GIGNOUX, D
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 22.01.2009
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Physics; Thermal expansion; thermomechanical effects and density; Thermal properties of condensed matter; Thermal properties of crystalline solids; Magnetization; Magnetostriction; Vanadium alloys; Gas solid reaction; Iron alloys; Spin reorientation; Neodymium alloys; Thermal expansion; Magnetic anisotropy; Gas-solid reaction; Hydrogen additions; Thermal expansion coefficient; Interstitial impurities; Rare earth alloys; 75.80.+q; Nitrogen additions; Magnetoelastic effects; 75.30.Gw; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2008.01.004

NdFe10V2 composites were prepared and the influence of H and N interstitial modifications on their structural and magnetoelastic properties were studied. By hydrogenation, the thermal expansion trace is markedly affected so that hydrogen-induced modification can be proposed as an effective method for monitoring the thermal expansion coefficient of NdFe10V2. Besides, nitrogenation does not have pronounced effect on the thermal expansion behavior of the NdFe10V2 compound. Below the spin reorientation temperature TSR = 130 K, the anisotropic magnetostriction Deltalambda of the hydride is negligible, while above TSR the saturation value of Deltalambda considerably decreases by hydrogenation. Our results show that below TSR = 130 K nitrogenation changes the sign of the anisotropic magnetostriction, while above TSR the thermal behaviour of Deltalambda is similar to that of the host compound. These results are discussed as due to the influence of interstitial modifications on both the magnetic anisotropy and the magnetization.