Entropic signatures of the skyrmion lattice phase in MnSi<sub>1-x</sub>Al<sub>x</sub> and Fe<sub>1-y</sub>Co<sub>y</sub>Si.
ORAL
Abstract
Cubic B20 magnets such as MnSi, (Fe, Co)Si host magnetic skyrmion lattice over a small range of temperature and magnetic fields. Although the qualitative features of the magnetic phase diagram look similar for MnSi and Fe1-yCoySi, there are some differences in the nature of magnetic transition due to the effects of disorder and the difference in the dynamical behavior of spins. We compare MnSi and Fe1-yCoySi based on the change in magnetic entropy during conical to magnetic skyrmion lattice transition. Our results indicate that despite qualitative similarities in the magnetic phase diagrams, the entropic signatures related to such topological transition are significantly reduced in Fe1-yCoySi due to the effect of disorder and the differences in spin dynamical behavior.
*The work at Kennesaw State University was supported by the Mentor-Protege award and travel support from the Department of Physics. This material is based upon work supported by the U.S. Department of Energy under EPSCoR Grant No. DE-SC0012432 with additional support from the Louisiana Board of Regents. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.
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Presenters
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Chetan Dhital
- Kennesaw State University