Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 97: Spincaloric Transport I (organized by MA)

TT 97.7: Vortrag

Donnerstag, 3. April 2014, 18:15–18:30, HSZ 403

Magnetic field dependence of the thermal conductivity of LCMO — •Christoph Euler, Paulina Holuj, Tino Jäger, Christian Mix, and Gerhard Jakob — University of Mainz, Germany

We measured the low-temperature out-of-plane thermal conductivity of LCMO using the differential 3-omega technique and found substantial magnetic field dependence between 100 K and room temperature. The effect is observed to be largest in the vicinity of the metal-insulator transition, since the enhancement in thermal conductivity is caused by the colossal magnetoresistance effect increasing the electronic contribution to the thermal conductivity. Our measurements allow a discussion of the Wiedemann-Franz law in the framework of strong electron-lattice coupling.