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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons: Spin Systems and Itinerant Magnets - Frustrated Magnets II

TT 20.3: Vortrag

Montag, 31. März 2014, 15:30–15:45, HSZ 304

Spin-lattice coupling in the frustrated S=1/2 compound Cu₇Te₆O₁₈F₂ — Vladimir Gnezdilov^1,2, •Peter Lemmens¹, Azat Sharafeev¹, Angela Möller³, Shichao Hu⁴ und Mats Johnsson⁴ — ¹IPKM, TU-BS, Braunschweig — ²ILTPE NAS, Ukraine — ³Dept. Chem., Univ., Houston, USA — ⁴DMEC, Stockholm, Sweden

We present a Raman scattering study of the novel spin-frustrated S=1/2 compound Cu₇Te₆O₁₈F₂. The phonons of this compound display evidence for strong spin-lattice coupling. Furthermore, there exists a broad magnetic scattering continuum that markedly changes with the onset of long-range ordering. Work supported by DFG and B-IGSM.