Coexistence of intrinsic and extrinsic magnetoresistance in the double-perovskite Sr[sub 2]Fe(Mo[sub 1-x]W[sub x])O[sub 6-w] system

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorLindén, J.
dc.contributor.authorYamamoto, T.
dc.contributor.authorNakamura, J.
dc.contributor.authorKarppinen, Maarit
dc.contributor.authorYamauchi, H.
dc.contributor.departmentKemian laitosfi
dc.contributor.departmentDepartment of Chemistryen
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.schoolSchool of Chemical Technologyen
dc.date.accessioned2015-10-08T09:02:26Z
dc.date.available2015-10-08T09:02:26Z
dc.date.issued2001
dc.description.abstractIn a recent study, it was shown that by partially substituting Mo with W in the double-perovskite Sr2FeMoO6−w system, the magnetoresistivity can be enhanced. [K.-I. Kobayashi, T. Okuda, Y. Tomioka, T. Kimura, and Y. Tokura, J. Magn. Magn. Mater. 218, 17 (2000).] In order to explain the increase in the magnetoresistivity a series of W-substituted Sr2Fe(Mo1−xWx)O6−w samples with 0⩽x⩽1 was synthesized. Upon increasing the W content, the samples began to exhibit coexistence of paramagnetism and ferrimagnetism at 300 K. Signatures of antiferromagnetic ordering appeared around TN≈50 K for x⩾0.6. In samples with 0.7⩽x⩽0.8 a broad peak was observed in the magnetoresistance data at temperatures corresponding to the Néel temperature. The peak was found to have its origin in the colossal magnetoresistanceeffect. The W-substituted samples were partially ferrimagnetic and therefore also exhibited the tunneling-type magnetoresistance, which is characteristic of pure Sr2FeMoO6−w. The coexistence of the two types of magnetoresistanceeffect is responsible for the enhancement of the overall magnetoresistance value. A slight enhancement in the magnetoresistance values around 300 K for the strongly W-substituted samples was found to be related to a second colossal magnetoresistance peak related to the para- to ferrimagnetic transition at Tc.en
dc.description.versionPeer revieweden
dc.format.extent2736-2738
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLindén, J. & Yamamoto, T. & Nakamura, J. & Karppinen, Maarit & Yamauchi, H.. 2001. Coexistence of intrinsic and extrinsic magnetoresistance in the double-perovskite Sr[sub 2]Fe(Mo[sub 1-x]W[sub x])O[sub 6-w] system. Applied Physics Letters. Volume 78, Issue 18. 2736-2738. ISSN 0003-6951 (printed). DOI: 10.1063/1.1366357.en
dc.identifier.doi10.1063/1.1366357
dc.identifier.issn0003-6951 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/18005
dc.identifier.urnURN:NBN:fi:aalto-201510084569
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseriesVolume 78, Issue 18
dc.rights© 2001 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the authors and the American Institute of Physics. The following article appeared in Applied Physics Letters. Volume 78, Issue 18 and may be found at http://scitation.aip.org/content/aip/journal/apl/78/18/10.1063/1.1366357.en
dc.rights.holderAIP Publishing
dc.subject.keywordferrimagnetismen
dc.subject.keywordmagnetoresistanceen
dc.subject.keywordmolybdenumen
dc.subject.keywordperovskitesen
dc.subject.otherChemistryen
dc.subject.otherPhysicsen
dc.titleCoexistence of intrinsic and extrinsic magnetoresistance in the double-perovskite Sr[sub 2]Fe(Mo[sub 1-x]W[sub x])O[sub 6-w] systemen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
A1_lindén_j_2001.pdf
Size:
547.93 KB
Format:
Adobe Portable Document Format