Effect of lanthanide ions on the magnetotransport properties in layered)

N. Hur, Jin Tae Kim, K. Yoo, Y. Park, J. Park, E. Chi, Y. Kwon

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


The magnetoresistances (MR’s) and magnetic properties of layered manganese oxides, (Formula presented) ((Formula presented); (Formula presented)-327), have been investigated. The La-, Pr-, and Nd-substituted compounds show metal insulator transitions below 150 K, whereas isostructural Gd-327 compound is semiconducting and paramagnetic. For La-327, the transition temperature corresponds well to the onset of ferromagnetic ordering and the MR ratio is fairly large compared with perovskite-type (Formula presented) oxides. The Pr and Nd analogs show negative MR’s, but both compounds display other anomalous transitions to semiconductors below 50 K. Neither material shows a transition to a ferromagnetic state below 350 K. The observation of colossal magnetoresistance in the absence of bulk ferromagnetism suggests that the double-exchange interaction alone is not sufficient to explain the resistivity of (Formula presented)-327 near (Formula presented).

Original languageEnglish
Pages (from-to)10740-10744
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number17
Publication statusPublished - 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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