DOI: 10.1063/1.2885730. Room temperature ferromagnetism in ZnO films due to defects

Room temperature ferromagnetism in ZnO films due to defects

10.1063/1.2885730

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

ZnO films were prepared by pulsed laser deposition on a-plane sapphire substrates under N2 atmosphere. Ferromagnetic loops were obtained with the superconducting quantum interference device at room temperature, which indicate a Curie temperature much above room temperature. No clear ferromagnetism was observed in intentionally Cu-doped ZnO films. This excludes that Cu doping into ZnO plays a key role in tuning the ferromagnetism in ZnO. 8.8% negative magnetoresistance probed at 5K at 60kOe on ferromagnetic ZnO proves the lack of s-d exchange interaction. Anomalous Hall effect (AHE) was observed in ferromagnetic ZnO as well as in nonferromagnetic Cu-doped ZnO films, indicating that AHE does not uniquely prove ferromagnetism. The observed ferromagnetism in ZnO is attributed to intrinsic defects.

Bibliography

Xu, Q., Schmidt, H., Zhou, S., Potzger, K., Helm, M., Hochmuth, H., Lorenz, M., Setzer, A., Esquinazi, P., Meinecke, C., & Grundmann, M. (2008). Room temperature ferromagnetism in ZnO films due to defects. Applied Physics Letters, 92(8).

Authors 11

Qingyu Xu (first)
Heidemarie Schmidt (additional)
Shengqiang Zhou (additional)
Kay Potzger (additional)
Manfred Helm (additional)
Holger Hochmuth (additional)
Michael Lorenz (additional)
Annette Setzer (additional)
Pablo Esquinazi (additional)
Christoph Meinecke (additional)
Marius Grundmann (additional)

References 21 Referenced 325

10.1103/PhysRevB.72.165204 / Phys. Rev. B (2004)
10.1126/science.287.5455.1019 / Science (2000)
10.1103/PhysRevLett.93.177206 / Phys. Rev. Lett. (2004)
10.1007/s10854-005-3232-1 / J. Mater. Sci.: Mater. Electron. (2005)
10.1063/1.2437111 / Appl. Phys. Lett. (2007)
10.1016/j.cossms.2006.03.002 / Curr. Opin. Solid State Mater. Sci. (2005)
10.1103/PhysRevB.75.205206 / Phys. Rev. B (2007)
10.1103/PhysRevLett.96.197208 / Phys. Rev. Lett. (2006)
10.1063/1.2778470 / Appl. Phys. Lett. (2007)
10.1063/1.2804081 / Appl. Phys. Lett. (2007)
10.1088/0953-8984/19/3/036219 / J. Phys.: Condens. Matter (2007)
10.1016/j.ssc.2007.08.043 / Solid State Commun. (2007)
10.1103/PhysRevB.72.161313 / Phys. Rev. B (2005)
10.1002/9780470022184 / Handbook of Magnetism and Advanced Magnetic Materials by Kronmüller (2007)
10.1016/j.jmmm.2007.04.015 / J. Magn. Magn. Mater. (2007)
10.1063/1.2007864 / Appl. Phys. Lett. (2005)
10.1103/PhysRevB.76.134417 / Phys. Rev. B (2007)
10.1016/j.tsf.2007.06.145 / Thin Solid Films (2008)
10.1063/1.2032588 / Appl. Phys. Lett. (2005)
{'key': '2023070217401447300_c20'}
10.1103/PhysRevLett.95.227203 / Phys. Rev. Lett. (2005)

Dates

Type	When
Created	17 years, 5 months ago (March 3, 2008, 9:38 a.m.)
Deposited	2 years, 1 month ago (July 2, 2023, 1:40 p.m.)
Indexed	1 day, 3 hours ago (Aug. 21, 2025, 12:42 p.m.)
Issued	17 years, 5 months ago (Feb. 25, 2008)
Published	17 years, 5 months ago (Feb. 25, 2008)
Published Online	17 years, 5 months ago (Feb. 29, 2008)
Published Print	17 years, 5 months ago (Feb. 25, 2008)

Funders 0

None

BibTeX

@article{Xu_2008, title={Room temperature ferromagnetism in ZnO films due to defects}, volume={92}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.2885730}, DOI={10.1063/1.2885730}, number={8}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Xu, Qingyu and Schmidt, Heidemarie and Zhou, Shengqiang and Potzger, Kay and Helm, Manfred and Hochmuth, Holger and Lorenz, Michael and Setzer, Annette and Esquinazi, Pablo and Meinecke, Christoph and Grundmann, Marius}, year={2008}, month=feb }

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