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

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

Bannenberg, L.J. (TU Delft RST/Neutron and Positron Methods in Materials)
Kakurai, K. (RIKEN Center for Emergent Matter Science (CEMS); CROSS Tokai)
Qian, F. (TU Delft RST/Neutron and Positron Methods in Materials)
Lelièvre-Berna, E. (Institut Laue-Langevin)
Dewhurst, C. D. (Institut Laue-Langevin)
Onose, Y. (University of Tokyo)
Endoh, Y. (RIKEN Center for Emergent Matter Science (CEMS))
Tokura, Y (RIKEN Center for Emergent Matter Science (CEMS); University of Tokyo)
Pappas, C. (TU Delft RST/Neutron and Positron Methods in Materials)

2016-09-06

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.

http://resolver.tudelft.nl/uuid:df2c30ac-b227-40c2-8f2e-10b038132412

https://doi.org/10.1103/PhysRevB.94.104406

1098-0121

Physical Review B (Condensed Matter and Materials Physics), 94 (10)

Institutional Repository

journal article

© 2016 L.J. Bannenberg, K. Kakurai, F. Qian, E. Lelièvre-Berna, C. D. Dewhurst, Y. Onose, Y. Endoh, Y Tokura, C. Pappas