Study of the pseudobinary compounds LaNi5-x Fe x (x ≤ 1.2) by X-ray diffraction, Mössbauer spectroscopy and magnetic measurements

J. Lamloumi , A. Percheron-Guegan , J.C. Achard , G. Jehanno , D. Givord

Mössbauer experiments show that in LaNi5-xFe x (x ≤ 1.2), the iron atoms are almost exclusively located on the 3g sites of the P6/mmm space group. Susceptibility measurements show that, with increasing iron concentration, these compounds change from paramagnetic to ferromagnetic passing through a spin glass like behaviour. For the iron richest compound (x = 1.2) the iron magnetic moments align along the c axis. Comparison of magnetization measurements and Mössbauer results indicates that the substitution of iron for nickel in LaNi5 induces a magnetic moment on the previously non magnetic nickel atoms.

Mots clés: crystal atomic structure of alloys; ferromagnetic paramagnetic transitions; iron alloys; lanthanum alloys; magnetic structure; magnetic susceptibility; magnetisation; Mossbauer effect; nickel alloys; spin glasses

Domaines: Articles anciens

J. Lamloumi, A. Percheron-Guegan, J.C. Achard, G. Jehanno, D. Givord. Study of the pseudobinary compounds LaNi5-x Fe x (x ≤ 1.2) by X-ray diffraction, Mössbauer spectroscopy and magnetic measurements. Journal de Physique, 1984, 45 (10), pp.1643-1652. ⟨10.1051/jphys:0198400450100164300⟩. ⟨jpa-00209905⟩