Extrinsic inhomogeneity effects in magnetic, transport and magnetoresistive properties of La1-xCaxMnO3 (x approximate to 0.33) crystal prepared by the floating-zone method uri icon

abstract

  • The magnetic, transport and magnetoresistive properties of La 1- xCa xMnO 3 (x 0.33) crystals prepared by the floating-zone method are studied. In general, these properties testify to rather good crystal perfection of the sample studied. In particular, a huge magnetoresistance ([R(0)-R(H)]/R(H) in the field H=5T is about 2680%) is found near the Curie temperature (216 K). At the same time, some distinct features of measured properties indicate the influence of extrinsic inhomogeneities arising due to technological factors in the sample preparation. Analysis of the data obtained shows that these are rare grain boundaries and twins. 2004 Elsevier B.V. All rights reserved.

published proceedings

  • PHYSICA B-CONDENSED MATTER

author list (cited authors)

  • Belevtsev, B. I., Naugle, D. G., Rathnayaka, K., Parasiris, A., & Fink-Finowicki, J.

citation count

  • 26

complete list of authors

  • Belevtsev, BI||Naugle, DG||Rathnayaka, KDD||Parasiris, A||Fink-Finowicki, J

publication date

  • January 2005