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Strong lattice relaxation associated to the diffusion rate of interstitial nitrogen reported in an earlier paper was taken into account in a determination of the excess expansivity of single crystal chromium near the antiferromagnetic to paramagnetic transition. An anomalous positive expansivity peak just below T N is thought of being the result of released magnetomechanical strain. The observations support the pinning model of antiferromagnetic domains.
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Stebler et al. (1970) studied this question.
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