2008年9月
Unusual metamagnetic transitions in Pr(0.5)Ca(0.5)Mn(0.97)Ga(0.03)O(3) studied by pulsed magnetic fields
PHYSICAL REVIEW B
- ,
- ,
- 巻
- 78
- 号
- 10
- 開始ページ
- 104404
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1103/PhysRevB.78.104404
- 出版者・発行元
- AMER PHYSICAL SOC
Several unusual and intriguing magnetic phenomena have been observed in the Ga-doped manganite Pr(0.5)Ca(0.5)Mn(0.97)Ga(0.03)O(3). 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 similar to 10(3) 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.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.78.104404
- ISSN : 1098-0121
- Web of Science ID : WOS:000259690400053