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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4040
Title: Electrical transport and magnetic properties of La0.5Ca0.5MnO3-y with varying oxygen content
Authors: Cai W.
Zhao J.
Zhang X.P.
Zhu M.H.
Zhang L.W.
Ogale S.B.
Wu T.
Venkatesan T.
Lu L.
Mandal, Tapas Kumar
Gopalakrishnan J.
Zhao Y.G.
Cao B.S.
Published in: Physical Review B - Condensed Matter and Materials Physics
Abstract: We report the tuning of oxygen content of La0.5Ca0.5MnO3-y and its effect on electrical transport and magnetic properties. A small reduction of oxygen content leads to a decrease in sample resistivity, which is more dramatic at low temperatures. No significant change is seen to occur in the magnetic properties for this case. Further reduction in the oxygen content increases the resistivity remarkably, as compared to the as-prepared sample. The amplitude of the ferromagnetic (FM) transition at 225 K decreases, and the antiferromagnetic (AFM) transition at 130 K disappears. For samples with y=0.17, insulator-metal transition and paramagnetic-ferromagnetic transition occur around 167 K. The results are explained in terms of the effect of oxygen vacancies on the coexistence of the metallic FM phase and the insulating charge ordered AFM phase.
Citation: Physical Review B - Condensed Matter and Materials Physics (2002), 65(14): 1444061-1444066
URI: http://repository.iitr.ac.in/handle/123456789/4040
Issue Date: 2002
ISSN: 1631829
Author Scopus IDs: 57198996688
57191637799
57205298508
56720658800
8506644400
55157007700
56937399900
35413851000
56405829900
57200780613
36794761100
35304405800
7102832631
Author Affiliations: Cai, W., Department of Physics, Tsinghua University, Beijing 100084, Taiwan
Zhao, J., Department of Physics, Tsinghua University, Beijing 100084, Taiwan
Zhang, X.P., Department of Physics, Tsinghua University, Beijing 100084, Taiwan
Zhu, M.H., Department of Physics, Tsinghua University, Beijing 100084, Taiwan
Zhang, L.W., Department of Physics, Tsinghua University, Beijing 100084, Taiwan
Ogale, S.B., Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, 20742 MD, United States
Wu, T., Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, 20742 MD, United States
Venkatesan, T., Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, 20742 MD, United States
Lu, L., Institute of Physics, Chinese Academy of Sciences, Beijing 100080, Taiwan
Mandal, T.K., Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
Gopalakrishnan, J., Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
Zhao, Y.G., Department of Physics, Tsinghua University, Beijing 100084, Taiwan, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, Taiwan
Cao, B.S., Department of Physics, Tsinghua University, Beijing 100084, Taiwan, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, Taiwan
Appears in Collections:Journal Publications [CY]

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