Spin-charge-lattice coupling through resonant multimagnon excitations in multiferroic BiFe O3

Journal Article

Ramirez, M.O., A. Kumar, S.A. Denev, Y.H. Chu, J. Seidel, L.W. Martin, S.-Y. Yang, R.C. Rai, X.S. Xue, J.F. Ihlefeld, N.J. Podraza, E. Saiz, S. Lee, J. Klug, S.W. Cheong, M.J. Bedzyk, O. Auciello, D.G. Schlom, J. Orenstein, Ramamoorthy Ramesh, J.L. Musfeldt, A.P. Litvinchuk, V. Gopalan

10.1063/1.3118576

Spin-charge-lattice coupling mediated by multimagnon processes is demonstrated in multiferroic BiFe O3. Experimental evidence of two- and three-magnon excitations as well as multimagnon coupling at electronic energy scales and high temperatures are reported. Temperature dependent Raman experiments show up to five resonant enhancements of the two-magnon excitation below the Ńel temperature. These are shown to be collective interactions between on-site Fe d-d electronic resonance, phonons, and multimagnons. © 2009 American Institute of Physics.

Applied Physics Letters

94

2009

00036951

Ramesh Lab