File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Phase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 ≤ x ≤ 0.3) manganite oxides

TitlePhase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 ≤ x ≤ 0.3) manganite oxides
Authors
Issue Date2011
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal of Applied Physics, 2011, v. 110 n. 11, article no. 113914 How to Cite?
AbstractThe effects of tetravalent hafnium doping on the structural, transport, and magnetic properties of polycrystalline La1−xHfxMnO3 (LHMO) (0.05 ≤ x ≤ 0.3) were investigated systematically. LHMO exhibited a typical colossal magnetoresistance effect via the double-exchange between Mn2+ and Mn3+ ions, instead of that between Mn3+ and Mn4+ ions in hole-doped manganites. A phase diagram was obtained for the first time through magnetization and resistance measurements in a broad temperature range. As the Hf concentration varied from x = 0.05 to 0.3, the Curie point and metal-to-insulator transition temperature increased significantly, whereas the magnetization and resistivity decreased remarkably. An abnormal enhancement of the magnetization was observed at about 42 K. It was further confirmed that a second magnetic phase MnO2 in LHMO gives rise to such a phenomenon. The possible causes are discussed in detail. The dynamic magnetic properties of LHMO, including relaxation and aging processes, were studied, demonstrating a spin-glass state at low temperature accompanied by a ferromagnetic phase.
Persistent Identifierhttp://hdl.handle.net/10722/145578
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.603
ISI Accession Number ID
Funding AgencyGrant Number
Research Grant Council of Hong KongHKU702409P
URC of the University of Hong Kong
National Natural Science Foundation of China
National Basic Research Program of China
Funding Information:

This work has been supported by a grant from the Research Grant Council of Hong Kong (Project No. HKU702409P), the URC of the University of Hong Kong, the National Natural Science Foundation of China, and the National Basic Research Program of China.

 

DC FieldValueLanguage
dc.contributor.authorGuo, EJen_US
dc.contributor.authorWang, Len_US
dc.contributor.authorWu, ZPen_US
dc.contributor.authorWang, Len_US
dc.contributor.authorLu, HBen_US
dc.contributor.authorJin, KJen_US
dc.contributor.authorGao, Jen_US
dc.date.accessioned2012-02-28T01:55:40Z-
dc.date.available2012-02-28T01:55:40Z-
dc.date.issued2011en_US
dc.identifier.citationJournal of Applied Physics, 2011, v. 110 n. 11, article no. 113914en_US
dc.identifier.issn0021-8979en_US
dc.identifier.urihttp://hdl.handle.net/10722/145578-
dc.description.abstractThe effects of tetravalent hafnium doping on the structural, transport, and magnetic properties of polycrystalline La1−xHfxMnO3 (LHMO) (0.05 ≤ x ≤ 0.3) were investigated systematically. LHMO exhibited a typical colossal magnetoresistance effect via the double-exchange between Mn2+ and Mn3+ ions, instead of that between Mn3+ and Mn4+ ions in hole-doped manganites. A phase diagram was obtained for the first time through magnetization and resistance measurements in a broad temperature range. As the Hf concentration varied from x = 0.05 to 0.3, the Curie point and metal-to-insulator transition temperature increased significantly, whereas the magnetization and resistivity decreased remarkably. An abnormal enhancement of the magnetization was observed at about 42 K. It was further confirmed that a second magnetic phase MnO2 in LHMO gives rise to such a phenomenon. The possible causes are discussed in detail. The dynamic magnetic properties of LHMO, including relaxation and aging processes, were studied, demonstrating a spin-glass state at low temperature accompanied by a ferromagnetic phase.en_US
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jspen_US
dc.relation.ispartofJournal of Applied Physicsen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.rightsCopyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (Journal of Applied Physics, 2011, v. 110 n. 11, article no. 113914) and may be found at (http://jap.aip.org/resource/1/japiau/v110/i11/p113914_s1).en_US
dc.titlePhase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 ≤ x ≤ 0.3) manganite oxidesen_US
dc.typeArticleen_US
dc.identifier.emailGuo, EJ: ejguo@hku.hken_US
dc.identifier.emailWang, L: wanglin1@hku.hken_US
dc.identifier.emailGao, J: jugao@hku.hken_US
dc.identifier.authorityGao, J=rp00699en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1063/1.3666056-
dc.identifier.scopuseid_2-s2.0-84859339804-
dc.identifier.hkuros198691en_US
dc.identifier.volume110en_US
dc.identifier.issue11, article no. 113914-
dc.identifier.isiWOS:000298254800088-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats