Artículo de revista
Current-induced exchange interactions and effective temperature in localized moment systems
Fecha
2012-03-21Registro en:
JOURNAL OF PHYSICS-CONDENSED MATTER Volume: 24 Issue: 11 Article Number: 116001 Published: MAR 21 2012
0953-8984
DOI: 10.1088/0953-8984/24/11/116001
Autor
Díaz, Sebastián
Núñez Vásquez, Álvaro
Institución
Resumen
We study theoretically the spin dynamics of a magnetic dimer serving as a contact between two electrodes. We find that the spin-spin coupling in the dimer can be dramatically modified from its equilibrium value. We show that the interaction can be tuned in such a way that it effectively changes its sign. The calculations show that, for large enough bias, the exchange interaction can even be changed from antiferromagnetic to ferromagnetic. The physical principles behind this result can be used as a new tool to achieve magneto-electric effects in molecular magnet systems.