High-throughput characterization of composition-spread manganese oxide films with a scanning SQUID microscope

T. Hasegawa, T. Kageyama, T. Fukumura, N. Okazaki, M. Kawasaki, H. Koinuma, Y. K. Yoo, F. Duewer, X. D. Xiang

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We have performed high-throughput characterization of composition-spread La 1-x Ca x MnO 3 (LCMO) and Nd 1-x Sr x MnO 3 (NSMO) films, fabricated by the precursor technique, with a scanning SQUID microscope (SSM). In both films, SSM successfully observed spatial variation of magnetic field, corresponding to magnetic phase transitions with respect to chemical composition. The obtained magnetic phase diagrams basically reproduced those reported in bulk materials. However, several distinctive differences have also been noted. For instance, the region identified as a charge ordered insulator in LCMO revealed intense field, suggesting the occurrence of phase separation into ferromagnetic and non-magnetic states. These results confirm that SSM possesses sufficient analytical performance for high-throughput characterization of combinatorial magnetic libraries in composition spread form.

Original languageEnglish
Pages (from-to)210-215
Number of pages6
JournalApplied Surface Science
Volume189
Issue number3-4
DOIs
Publication statusPublished - 2002 Apr 28
Externally publishedYes

Keywords

  • Combinatorial technique
  • Magnetic phase diagram
  • Manganese oxide
  • Scanning SQUID microscope
  • Thin film

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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