Influence of Technologically Driven Disorder on Spin Dynamics in ${\rm La} _ {0.9}{\rm Ca} _ {0.1}{\rm MnO} _ {3} $ Manganites in Mid-to-Far Critical Range Academic Article uri icon

abstract

  • Abstract: Electron paramagnetic resonance measurements were used to probe spin dynamics over mid-to-far critical range for four samples of different structural forms of La 0.9 Ca 0.1 MnO 3. As a result of different fabrication routes, these samples contain different imperfections which may have specific impacts on temperature dependence of the EPR linewidth. An analysis of critical spin relaxation speedup, manifested by sharp increase of the linewidth and Onsager kinetic coefficient when approaching to magnetic transition …

publication date

  • November 1, 2012