arXiv 1701.024672017-01-10cond-mat.str-el

The giant effect of magnetic ordering on a sound velocity in a sigma-Fe55Cr45 alloy

S. M. Dubiel, A. I. Chumakov

备注：: 8 pages, 3 figures, 17 references
发表信息：: EPL (Europhysics Letters), 117 (2017) 56001
DOI：: 10.1209/0295-5075/117/56001

英文摘要：

We studied atomic dynamics of sigma-Fe(100-x)Cr(x) (x=45 and 49.5) alloys using nuclear inelastic scattering of synchrotron radiation. For the sigma-Fe55Cr45 alloy, the derived reduced iron-partial density of phonon states reveal a huge difference in the low-energy region between magnetic and paramagnetic states. The latter implies a ca.36% increase of the sound velocity in the magnetic phase, which testifies to a magnetically-induced hardening of the lattice.

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