Magnetic clustering in LaNi/sub 5//sub -//sub x/Fe/sub x/ compounds

Journal Article · Fri Apr 15 04:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340515· OSTI ID:5328436

Escorne, M; Lamloumi, J; Percheron-Guegan, A; Achard, J C; Mauger, A; Jehanno, G

The magnetic phase diagram of LaNi/sub 5//sub -//sub x/Fe/sub x/ (0less than or equal toxless than or equal to1.2) has recently been investigated down to 20 K. This range has been extended here down to 1.6 K. Magnetic susceptibility curves chi(T) go through a maximum and then strongly decrease upon cooling below a temperature T/sub 1/ which, for all iron concentrations, is smaller than 15 K, i.e., much smaller than the Curie temperature T/sub c/ for xgreater than or equal to0.4 or the spin freezing temperature for x<0.3, previously determined. This anomalous behavior is correlated to a sharp decrease of the electrical resistivity at T/sub 1/. Moessbauer spectra do not show any anomalous behavior of the hyperfine field upon cooling through T/sub 1/. These results, associated to the continuous behavior of the magnetic susceptibility and electrical resistivity versus the iron concentration, suggest that with decreasing temperature there is a progressive freezing of small magnetic clusters which coexists with long-range ferromagnetic ordering for xgreater than or equal to0.4.

• Research Organization: Laboratoire de Chimie Metallurgique des Terres Rares, CNRS, 1 Place A. Briand, 92190 Meudon, France
• OSTI ID: 5328436
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
ALLOYS
DIAGRAMS
IRON ALLOYS
LANTHANUM ALLOYS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MOESSBAUER EFFECT
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS