New advanced magnetic La1.2(Sr1.8-xCax)Mn2O7 compounds with colossal magnetoresistance

R. S. Liu, C. H. Shen, S. F. Hu, J. G. Lin, C. Y. Huang

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

We present electrical, magnetic and crystal structure for a series of La1.2(Sr1.8-xCax)Mn2O7 (x = 0-0.8) manganites. The sample of x = 0.4 exhibits the highest magnetoresistance (MR) ratio [ρ(H)-ρ(O)/ρ(H)]×100% of -108% at the temperature of 102 K. The Curie temperature (TC) decreases from 135 K for x = 0-102 K for x = 0.4. The hysteresis phenomenon was observed when the temperatures were lower than the magnetic transition temperature. The static strain within the compound for x = 0.4 has also been found by high-resolution transmission electron microscopic techniques.

Original languageEnglish
Pages (from-to)113-115
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume209
Issue number1-3
DOIs
Publication statusPublished - 2000 Feb
EventProceedings of the 1999 International Symposium on Advanced Magnetic Technologies (ISAMT'99) - Taipei, Taiwan
Duration: 1999 May 241999 May 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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