Dresden 2017 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 67: Poster 4

MA 67.27: Poster

Friday, March 24, 2017, 09:30–13:00, P2-OG3

Towards an understanding of the basic mechanism of hysteresis at a first-order magneto-structural transition — •F. Scheibel¹, Ö. Çakir², T. Gottschall³, M. Ghorbani Zavareh^4,5, C. Salazar Mejia⁴, Y. Skourski⁴, F. Cugini⁶, A. Tekgül⁷, O. Gutfleisch³, J. Wosnitza⁴, M. Solzi⁶, M. Farle¹, and M. Acet¹ — ¹Faculty of Physics and CENIDE, University Duisburg-Essen, 47057 Duisburg, Germany — ²Physics Department, Yildiz Technical University, 34349 Istanbul, Turkey — ³Materialwissenschaft FG Funktionale Materialien , Technische Universität Darmstadt, 64289 Darmstadt, Germany — ⁴Hochfeld-Magnetlabor Dresden, Helmholtz-Zentrum Dresden-Rossendorf, Germany — ⁵Chemical Physics of Solids, Max-Planck-Institute, 01187 Dresden, Germany — ⁶Physics Department and CNISM, University of Parma, 43121 Parma, Italy — ⁷Physics Department, Akdeniz University, 07058 Antalya, Turkey

The reversibility of the adiabatic temperature change T in materials with a first-order magneto-structural transition (FOMST) is limited by the thermal hysteresis of the transition, making it a critical factor for refrigeration applications. Adiabatic magnetization and T studies with different field-change rates up to 700 T/s are performed to understand the dynamics of the FOMST for antiperovskites, Heuslers, and transition metal pnictides. In particular, the effect of long range ferromagnetic ordering on the hysteresis is investigated. Work supported by the Deutsche Forschungsgemeinschaft (SPP 1599).