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

cited By 38

Ramesh Lab