Nonlinear magnetoelastic behavior of the metastable bcc phases Co and Ni: Importance of third-order contributions for bcc Ni
Abstract
The first- and second-order magnetoelastic coefficients of the metastable bcc phases Co and Ni are calculated by using a combination of the phenomenological theory of nonlinear magnetoelasticity with the ab-initio density functional electron theory. The magnetoelastic behavior of the bcc phases is drastically different from that of the corresponding fcc phases. The recently synthesized bcc phase of Ni appears to be an example of a material for which third-order magnetoelastic effects are essential.
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