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1 PublicationTransport in ZnCoO thin films with stable bound magnetic polarons
Kaspar, T.; Fiedler, J.; Skorupa, I.; Bürger, D.; Schmidt, O. G.; Schmidt, H.
Abstract
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.
Keywords: magnetic semiconductors; spintronics; Schottky contact; depletion layer
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APL Materials 2(2014), 076101
DOI: 10.1063/1.4886216
Cited 6 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-18858