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http://hdl.handle.net/10397/4778
| Title: | Anomalous second ferromagnetic phase transition as a signature of spinodal decomposition in Fe-doped GeTe diluted magnetic semiconductor | Authors: | Tong, F Hao, JH Chen, ZP Gao, G Tong, H Miao, XS |
Issue Date: | 14-Nov-2011 | Source: | Applied physics letters, 14 Nov. 2011, v. 99, no. 20, 202508, p. 1-3 | Abstract: | Structural and magnetic properties of diluted magnetic semiconductor Ge[sub 1-x]Fe[sub x]Te thin films are investigated. The conventional structure analysis shows c-axis orientation with columnar growth of the films and no indication of Fe clusters or second phase. Magnetic measurements combined with theory models reveal that two ferromagnetic phase transitions occur. We consider that the second ferromagnetic phase transition in high Fe content thin film is from a ferromagnetic phase with long range exchange interaction to a superparamagnetic phase with dipole interaction between Fe clusters, which can be viewed as a signature of spinodal decomposition in Ge[sub 1-x]Fe[sub x]Te material. | Keywords: | Exchange interactions (electron) Ferromagnetic materials Ferromagnetic-paramagnetic transitions Germanium compounds Iron compounds Long-range order Magnetic thin films Paramagnetism Semiconductor thin films Semimagnetic semiconductors Spinodal decomposition |
Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | DOI: | 10.1063/1.3663550 | Rights: | © 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in F. Tong et al., Appl. Phys. Lett. 99, 202508 (2011) and may be found at http://link.aip.org/link/?apl/99/202508 |
| Appears in Collections: | Journal/Magazine Article |
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|---|---|---|---|---|
| Tong_Anomalous_Second_Ferromagnetic.pdf | 1.11 MB | Adobe PDF | View/Open |
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