Magnetic Ordering and Relation to the Metal-Insulator Transition in Pr{sub 1-x}Sr{sub x}MnO{sub 3} and Nd{sub 1-x}Sr{sub x}MnO{sub 3} with x{approximately}1/2
Journal Article
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· Physical Review Letters
- The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)
- Neutron Scattering Laboratory, I.S.S.P., University of Tokyo, Tokai, Ibaraki 319-11 (Japan)
- Joint Research Center for Atom Technology (JRCAT), Tsukuba, Ibaraki 305 (Japan)
- Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)
We studied three distorted perovskite manganites, Pr{sub 1/2}Sr {sub 1/2}MnO {sub 3} and Nd{sub 1-x}Sr {sub x}MnO{sub 3} with x=1/2 and 0.55 by the neutron diffraction technique. Two samples with x=1/2 exhibit a transition from a ferromagnetic (FM) metal to an antiferromagnetic (AFM) nonmetal. We demonstrate that, in the low temperature phase, Nd{sub 1/2}Sr {sub 1/2}MnO {sub 3} has a CE-type AFM structure with charge ordering, while Pr{sub 1/2}Sr {sub 1/2}MnO {sub 3} and Nd{sub 0.45} Sr{sub 0.55} MnO{sub 3} exhibit an A-type layered AFM structure, but show no clear sign of charge ordering. From the present results, we suggest a possible anisotropy of transport as well as magnetic properties in the A-type AFM structure near x{approximately}1/2. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 509080
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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