Structure and charge ordering behavior of the colossal magnetoresistive manganite Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3}

Journal Article · Wed Apr 01 04:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3072472· OSTI ID:21190162

Luo, Z P; Miller, D J; Mitchell, J F ^[1]

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1. Microscopy and Imaging Center, Texas A and M University, College Station, Texas 77843-2257 (United States)

The structure and charge ordering (CO) behavior of the three-dimensional colossal magnetoresistive manganite Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} have been studied by transmission electron microscopy. The electron diffraction analysis suggested its room temperature structure as orthorhombic, with a Pnma space group. By controlling the experimental temperature setting either above or below the CO transition temperature, it was observed that the CO grew through the propagation of the CO front. The twin boundaries were the barriers of the CO front movement. In heavily ion irradiated samples, it was observed that the CO front was pinned by the intracrystalline defects, forming a zigzag shape interface. Moreover, the electron beam was observed to influence the CO.

• OSTI ID: 21190162
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 105; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL DEFECTS
ELECTRON BEAMS
ELECTRON DIFFRACTION
ION BEAMS
MAGNETORESISTANCE
MANGANATES
NEODYMIUM COMPOUNDS
ORTHORHOMBIC LATTICES
SPACE GROUPS
STRONTIUM COMPOUNDS
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY