Abstract
The electric-field-induced modification in the Curie temperature of prototypical transition-metal thin films with the perpendicular magnetic easy axis, a freestanding Fe(001) monolayer and a Co monolayer on Pt(111), is investigated by first-principles calculations of spin-spiral structures in an external electric field ( field). An applied field is found to modify the magnon (spin-spiral formation) energy; the change arises from the -field-induced screening charge density in the spin-spiral states due to - hybridizations. The Heisenberg exchange parameters obtained from the magnon energy suggest an -field-induced modification of the Curie temperature, which is demonstrated via Monte Carlo simulations that take the magnetocrystalline anisotropy into account.
- Received 20 May 2014
DOI:https://doi.org/10.1103/PhysRevLett.114.107202
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