Volume 81, Number 1, January 2008
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||19 November 2007|
Spin dependence of the magnetization step in the Pr-doped manganites
Department of Physics, Shanghai University - Shanghai 200444, China
Corresponding author: firstname.lastname@example.org
Accepted: 26 October 2007
Magnetic measurements were performed to study a single crystal Pr0.5Sr0.5MnO3 and polycrystalline Pr0.6Ca0.4MnO3. Magnetic-fieldinduced magnetization step is observed at low temperature for Pr-doped phase-separated manganites. Magnetization measurements indicate that the spin-stiffness constant D exhibits large magnetic-field dependence. Moreover, there exists a remarkable change of the spin-stiffness constant corresponding to the variety of the step-like magnetization. Our results suggest that the spin-wave inherent to the coexistence of the antiferromagnetic and ferromagnetic phases plays a crucial role in the mechanism of these magnetic transformations.
PACS: 71.30.+h – Metal-insulator transitions and other electronic transitions / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EPLA, 2008
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