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Stress‐induced Curie temperature increase in the Fe 64 Ni 36 invar alloy
Author(s) -
Gorria Pedro,
Boada Roberto,
FernándezMartínez Alejandro,
Garbarino Gastón,
Smith Ronald I.,
Chaboy Jesús,
Alonso J. I. García,
MartínezBlanco David,
Castro German R.,
Mezouar Mohamed,
Hernando Antonio,
Blanco Jesús A.
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200903056
Subject(s) - curie temperature , invar , materials science , alloy , neutron diffraction , magnetization , diffraction , condensed matter physics , crystallography , coupling (piping) , metallurgy , ferromagnetism , chemistry , crystal structure , optics , magnetic field , physics , quantum mechanics
Structural and magnetic changes on invar Fe 64 Ni 36 alloy ( T C = 500 K) produced by mechanical milling followed by heating up to 1073 K, were investigated by neutron diffraction, magnetization measurements, X‐ray diffraction under high pressures and X‐ray absorption at both Fe and Ni K‐edges. We argue that the strain induced in the Fe 64 Ni 36 material after this treatment mainly affects the Fe sites due to the magnetovolume coupling, the most notorious feature being the increase of the Curie temperature (Δ T C = 70 K). (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)