Effect of porosity on FMR linewidth of Ln(0.67)A(0.33)MnO(3) (Ln = La, Pr;A = Ca, Sr)

Authors
Rivadulla, F Hueso, LE Jardon, C Vazquez-Vazquez, C Lopez-Quintela, MA Rivas, J Causa, MT Ramos, CA Sanchez, RD
Citation
F. Rivadulla et al., Effect of porosity on FMR linewidth of Ln(0.67)A(0.33)MnO(3) (Ln = La, Pr;A = Ca, Sr), J MAGN MAGN, 197, 1999, pp. 470-472
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN journal
03048853 → ACNP
Volume
197
Year of publication
1999
Pages
470 - 472
Database
ISI
SICI code
0304-8853(199905)197:<470:EOPOFL>2.0.ZU;2-1
Abstract
Magnetization and ferromagnetic resonance (FMR) measurements near the Curie temperature have been taken from sol-gel and ceramic samples of Ln(0.67)A( 0.33)MnO(3) (Ln = Pr, La; A = Ca, Sr). We demonstrate that the demagnetizin g fields arising from the pores in polycrystalline samples cause the FMR li ne broadening observed below 1.1 T-c, with respect to the values of the equ ivalent single crystals. (C) 1999 Elsevier Science B.V. All rights reserved .