Extended skyrmion lattice scattering and long-time memory in the chiral magnet Fe1-xCoxSi

L. J. Bannenberg, K. Kakurai, F. Qian, E. Lelièvre-Berna, C. D. Dewhurst, Y. Onose, Y. Endoh, Y. Tokura, C. Pappas

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Abstract

Small angle neutron scattering measurements on a bulk single crystal of the doped chiral magnet Fe1-xCoxSi with x=0.3 reveal a pronounced effect of the magnetic history and cooling rates on the magnetic phase diagram. The extracted phase diagrams are qualitatively different for zero and field cooling and reveal a metastable skyrmion lattice phase outside the A phase for the latter case. These thermodynamically metastable skyrmion lattice correlations coexist with the conical phase and can be enhanced by increasing the cooling rate. They appear in a wide region of the phase diagram at temperatures below the A phase but also at fields considerably smaller or higher than the fields required to stabilize the A phase.

Original languageEnglish
Article number104406
Number of pages6
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume94
Issue number10
DOIs
Publication statusPublished - 6 Sep 2016

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