Room temperature p-type conductivity and coexistence of ferroelectric order in ferromagnetic Li doped ZnO nanoparticles

Handle URI:
http://hdl.handle.net/10754/346738
Title:
Room temperature p-type conductivity and coexistence of ferroelectric order in ferromagnetic Li doped ZnO nanoparticles
Authors:
Awan, Saif Ullah; Hasanain, S. K.; Anjum, Dalaver H.; Awan, M. S.; Shah, Saqlain A.
Abstract:
Memory and switching devices acquired new materials which exhibit ferroelectric and ferromagnetic order simultaneously. We reported multiferroic behavior in Zn1-yLiyO(0.00≤y≤0.10) nanoparticles. The analysis of transmission electron micrographs confirmed the hexagonal morphology and wurtzite crystalline structure. We investigated p-type conductivity in doped samples and measured hole carriers in range 2.4×1017/cc to 7.3×1017/cc for different Li contents. We found that hole carriers are responsible for long range order ferromagnetic coupling in Li doped samples. Room temperature ferroelectric hysteresis loops were observed in 8% and 10% Li doped samples. We demonstrated ferroelectric coercivity (remnant polarization) 2.5kV/cm (0.11 μC/cm2) and 2.8kV/cm (0.15 μC/cm2) for y=0.08 and y=0.10 samples. We propose that the mechanism of Li induced ferroelectricity in ZnO is due to indirect dipole interaction via hole carriers. We investigated that if the sample has hole carriers ≥5.3×1017/cc, they can mediate the ferroelectricity. Ferroelectric and ferromagnetic measurements showed that higher electric polarization and larger magnetic moment is attained when the hole concentration is larger and vice versa. Our results confirmed the hole dependent coexistence of ferromagnetic and ferroelectric behavior at room temperature, which provide potential applications for switchable and memory devices.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab
Citation:
Room temperature p-type conductivity and coexistence of ferroelectric order in ferromagnetic Li doped ZnO nanoparticles 2014, 116 (16):164109 Journal of Applied Physics
Publisher:
American Institute of Physics
Journal:
Journal of Applied Physics
Issue Date:
28-Oct-2014
DOI:
10.1063/1.4900413
Type:
Article
ISSN:
0021-8979; 1089-7550
Additional Links:
http://scitation.aip.org/content/aip/journal/jap/116/16/10.1063/1.4900413
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorAwan, Saif Ullahen
dc.contributor.authorHasanain, S. K.en
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorAwan, M. S.en
dc.contributor.authorShah, Saqlain A.en
dc.date.accessioned2015-03-17T05:59:52Zen
dc.date.available2015-03-17T05:59:52Zen
dc.date.issued2014-10-28en
dc.identifier.citationRoom temperature p-type conductivity and coexistence of ferroelectric order in ferromagnetic Li doped ZnO nanoparticles 2014, 116 (16):164109 Journal of Applied Physicsen
dc.identifier.issn0021-8979en
dc.identifier.issn1089-7550en
dc.identifier.doi10.1063/1.4900413en
dc.identifier.urihttp://hdl.handle.net/10754/346738en
dc.description.abstractMemory and switching devices acquired new materials which exhibit ferroelectric and ferromagnetic order simultaneously. We reported multiferroic behavior in Zn1-yLiyO(0.00≤y≤0.10) nanoparticles. The analysis of transmission electron micrographs confirmed the hexagonal morphology and wurtzite crystalline structure. We investigated p-type conductivity in doped samples and measured hole carriers in range 2.4×1017/cc to 7.3×1017/cc for different Li contents. We found that hole carriers are responsible for long range order ferromagnetic coupling in Li doped samples. Room temperature ferroelectric hysteresis loops were observed in 8% and 10% Li doped samples. We demonstrated ferroelectric coercivity (remnant polarization) 2.5kV/cm (0.11 μC/cm2) and 2.8kV/cm (0.15 μC/cm2) for y=0.08 and y=0.10 samples. We propose that the mechanism of Li induced ferroelectricity in ZnO is due to indirect dipole interaction via hole carriers. We investigated that if the sample has hole carriers ≥5.3×1017/cc, they can mediate the ferroelectricity. Ferroelectric and ferromagnetic measurements showed that higher electric polarization and larger magnetic moment is attained when the hole concentration is larger and vice versa. Our results confirmed the hole dependent coexistence of ferromagnetic and ferroelectric behavior at room temperature, which provide potential applications for switchable and memory devices.en
dc.publisherAmerican Institute of Physicsen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/jap/116/16/10.1063/1.4900413en
dc.rightsArchived with thanks to Journal of Applied Physicsen
dc.titleRoom temperature p-type conductivity and coexistence of ferroelectric order in ferromagnetic Li doped ZnO nanoparticlesen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.identifier.journalJournal of Applied Physicsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistanen
dc.contributor.institutionCenter for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44000, Pakistanen
dc.contributor.institutionDepartment of Materials Science & Engineering, University of Washington, Seattle, Washington 98195, USAen
dc.contributor.institutionDepartment of Physics, COMSATS Institute of Information Technology, Islamabad 44000, Pakistanen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAnjum, Dalaver H.en
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