Penetration of electromagnetic field through the La-Er-Ba manganite far above the magnetic phase transition temperature
Institute of Metal Physics Ural Division of RAS, 18 S. Kovalevskaya St, 620041 Ekaterinburg, Russia
2 Institute of Solid State Chemistry Ural Division of RAS, 91 Pervomaiskaya St, 620219 Ekaterinburg, Russia
Revised: 15 November 2006
Published online: 3 February 2007
Using the technique of penetration of electromagnetic waves through the bulk samples of La0.60Er0.07Ba0.33MnO3 manganite, it is shown that in this class of strongly correlated materials the local dynamic magnetic ordering is preserved at the temperature by 66 K above the Curie temperature where the static long-range magnetic order is absent. In this temperature range the dynamic magnetic permeability exceeds unity and is frequency dependent. The average lifetime of local ordered states is estimated.
PACS: 75.47.Lx – Manganites / 75.47.-m – Magnetotransport phenomena; materials for magnetotransport / 75.47.Gk – Colossal magnetoresistance
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007