Transport in ZnCoO thin films with stable bound magnetic polarons

Transport in ZnCoO thin films with stable bound magnetic polarons

Diluted magnetic ZnCoO films with 5 at.% Co have been fabricated by pulsed laser deposition on c-plane sapphire substrates and Schottky and Ohmic contacts have been prepared in top-top configuration. The diode current is significantly reduced after the diode has been subjected to an external magneti...

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Main Authors: Tim Kaspar, Jan Fiedler, Ilona Skorupa, Danilo Bürger, Oliver G. Schmidt, Heidemarie Schmidt
Format: Article
Language:English
Published: AIP Publishing LLC 2014-07-01
Series:APL Materials
Online Access:http://dx.doi.org/10.1063/1.4886216
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spelling doaj-f0bc285ebdfc48578b594e0f9e500dd12020-11-24T21:35:38ZengAIP Publishing LLCAPL Materials2166-532X2014-07-0127076101076101-710.1063/1.4886216001407APMTransport in ZnCoO thin films with stable bound magnetic polaronsTim Kaspar0Jan Fiedler1Ilona Skorupa2Danilo Bürger3Oliver G. Schmidt4Heidemarie Schmidt5Institute of Ion-Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, GermanyInstitute of Ion-Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, GermanyInstitute of Ion-Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, GermanyFaculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, Chemnitz 09107, GermanyFaculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, Chemnitz 09107, GermanyFaculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, Chemnitz 09107, GermanyDiluted magnetic ZnCoO films with 5 at.% Co have been fabricated by pulsed laser deposition on c-plane sapphire substrates and Schottky and Ohmic contacts have been prepared in top-top configuration. The diode current is significantly reduced after the diode has been subjected to an external magnetic field. In the reverse bias range the corresponding positive magnetoresistance is persistent and amounts to more than 1800% (50 K), 240% (30 K), and 50% (5 K). This huge magnetoresistance can be attributed to the large internal magnetic field in depleted ZnCoO with ferromagnetic exchange between stable bound magnetic polarons.http://dx.doi.org/10.1063/1.4886216
collection DOAJ
language English
format Article
sources DOAJ
author Tim Kaspar
Jan Fiedler
Ilona Skorupa
Danilo Bürger
Oliver G. Schmidt
Heidemarie Schmidt
spellingShingle Tim Kaspar
Jan Fiedler
Ilona Skorupa
Danilo Bürger
Oliver G. Schmidt
Heidemarie Schmidt
Transport in ZnCoO thin films with stable bound magnetic polarons
APL Materials
author_facet Tim Kaspar
Jan Fiedler
Ilona Skorupa
Danilo Bürger
Oliver G. Schmidt
Heidemarie Schmidt
author_sort Tim Kaspar
title Transport in ZnCoO thin films with stable bound magnetic polarons
title_short Transport in ZnCoO thin films with stable bound magnetic polarons
title_full Transport in ZnCoO thin films with stable bound magnetic polarons
title_fullStr Transport in ZnCoO thin films with stable bound magnetic polarons
title_full_unstemmed Transport in ZnCoO thin films with stable bound magnetic polarons
title_sort transport in zncoo thin films with stable bound magnetic polarons
publisher AIP Publishing LLC
series APL Materials
issn 2166-532X
publishDate 2014-07-01
description Diluted magnetic ZnCoO films with 5 at.% Co have been fabricated by pulsed laser deposition on c-plane sapphire substrates and Schottky and Ohmic contacts have been prepared in top-top configuration. The diode current is significantly reduced after the diode has been subjected to an external magnetic field. In the reverse bias range the corresponding positive magnetoresistance is persistent and amounts to more than 1800% (50 K), 240% (30 K), and 50% (5 K). This huge magnetoresistance can be attributed to the large internal magnetic field in depleted ZnCoO with ferromagnetic exchange between stable bound magnetic polarons.
url http://dx.doi.org/10.1063/1.4886216
work_keys_str_mv AT timkaspar transportinzncoothinfilmswithstableboundmagneticpolarons
AT janfiedler transportinzncoothinfilmswithstableboundmagneticpolarons
AT ilonaskorupa transportinzncoothinfilmswithstableboundmagneticpolarons
AT daniloburger transportinzncoothinfilmswithstableboundmagneticpolarons
AT olivergschmidt transportinzncoothinfilmswithstableboundmagneticpolarons
AT heidemarieschmidt transportinzncoothinfilmswithstableboundmagneticpolarons
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