Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite

K. V. Kamenev*, G. Balakrishnan, D. Mc K. Paul, G. J. Mcintyre

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Magnetic pressure-temperature phase diagram of La1.4Sr1.6Mn2O7 layered manganese oxide has been studied by neutron diffraction. Three phases have been found in this compound at ambient pressure: high-temperature phase with quasi two-dimensional correlations of the magnetic moments on Mn sites and two low-temperature phases with long-range order - antiferromagnetic and ferromagnetic. Under hydrostatic pressure the antiferromagnetic phase is favoured with respect to the two-dimensional and long-range ferromagnetic phases. The magnetic phase with two-dimensional correlations is thus suppressed by the antiferromagnetic phase with long-range order. We discuss this result in terms of the pressure-induced electron transfer and compare our conclusions with predictions given by theoretical calculations.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalHigh Pressure Research
Volume22
Issue number1
DOIs
Publication statusPublished - Apr 2002

Keywords / Materials (for Non-textual outputs)

  • Colossal magnetoresistance
  • High pressure
  • Layered manganese oxide
  • Low-dimensional magnetism
  • LAYERED PEROVSKITE STRUCTURE
  • MAGNETORESISTANCE

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