Unusual metamagnetic transitions in Pr0.5 Ca0.5 Mn0.97 Ga0.03 O3 studied by pulsed magnetic fields

Z. W. Ouyang, H. Nojiri, Shunsuke Yoshii

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16 Citations (Scopus)

Abstract

Several unusual and intriguing magnetic phenomena have been observed in the Ga-doped manganite Pr0.5 Ca0.5 Mn0.97 Ga0.03 O3. First, at 2.5 K, the magnetization steps and plateaus observed in the conventional M (H) measurements with a sweep rate of less than 1 T/s are readily suppressed under an ultrafast magnetic field with a sweep rate of ∼ 103 T/s. This feature is correlated with the collapse of the balance between the magnetic energy and the elastic energy within the martensiticlike scenario. Second, the zero-field cooled M (H) curve consists of two metamagnetic features, which were not observed in the conventional low-field magnetization measurements and might be associated with the coexistence of the pseudo-CE-type and the CE-type antiferromagnetic phases. Third, both the antiferromagnetic and ferromagnetic phases may coexist under certain combinations of the magnetic field and temperature. The temperature-field phase diagram exhibits a minimum critical field for the antiferromagnetic to ferromagnetic transition. Similarities with other magnetic phase-separated systems are pointed out.

Original languageEnglish
Article number104404
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number10
DOIs
Publication statusPublished - 2008 Sep 9

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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