Year: 1970
Type: article
Abstract: Measurements of the magnetostriction constants h 1 and h 2 are presented for Co x Mn 1- x Fe 2 O 4 in the range 2 K less-than-or-eq, slant T less-than-or-eq, slant 400 K for 0·005 less-than-or-eq, slant x less-than-or-eq, slant 1·12. The contribution of Co 2+ ions to the magnetostriction constants Δ h 1 and Δ h 2 have been extracted and compared with the theoretical predictions of the single-ion model. It is found that the magnetostriction varies linearly with cobalt concentration only for x <0·20. Close agreement between the theoretical and experimental temperature dependence of Δ h 1 and Δ h 2 over the whole temperature range implies a much larger spin-orbit coupling constant (αλ similar 270 cm −1 ) than has hitherto been thought appropriate to this system, together with a relatively small exchange interaction (β H similar 125 cm −1 ).
Authors: R D Greenough, E W Lee
Institutions: University of Hull, University of Southampton
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Funder: University of Sheffield
OpenAlex ID: W2020598601