Experimental scattering study reveals long-range modulation of spin-density waves in chromium-vanadium thin films, highlighting unexpected non-exchange proximity interactions.
The spin-density-wave (SDW) state in thin chromium films is well known to be strongly affected by proximity effects from neighboring layers. To date the main attention has been given to effects arising from exchange interactions at interfaces. In the present work we report on combined neutron and synchrotron scattering studies of proximity effects in Cr∕V films where the boundary condition is due to the hybridization of Cr with paramagnetic V at the interface. We find that the V∕Cr interface has a strong and long-range effect on the polarization, period, and the N\'eel temperature of the SDW in rather thick Cr films. This unusually strong effect is unexpected and not predicted by theory.
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Кравцов et al. (2004) studied this question.
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