Premium
Low temperature specific heat of Fe 65 (Ni 1 − x Mn x ) 35 alloys
Author(s) -
Kawarazaki S.,
Shiga M.,
Nakamura Y.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220500142
Subject(s) - ternary operation , invar , ferromagnetism , condensed matter physics , materials science , magnetic moment , specific heat , electron , atmospheric temperature range , analytical chemistry (journal) , crystallography , thermodynamics , chemistry , thermal expansion , metallurgy , physics , quantum mechanics , computer science , programming language , chromatography
Low temperature specific heat measurements were carried out for f.c.c. Fe 65 (Ni 1 − x Mn x ) 35 ternary alloys which cover the electron concentration range from 7.65 to 8.70. The electronic specific heat coefficient γ has a large peak against the mean electron concentration e / a around 8.5 and its peak value is 6.5 × 10 −3 cal/mol deg 2 . On the basis of the itinerant electron ferromagnetism this large γ‐value can be explained as purely electronic origin taking the change of exchange splitting of spin up and spin down bands into consideration, and the increase in γ in the Invar region has been shown to play an important role in the sharp deviation of the average magnetic moment from the Slater‐Pauling curve. An enhancement of the γ values similar to that found by Gupta et al. in f.c.c. Fe‐Ni and Fe‐Mn alloys was observed in these ternary alloys.