دورية أكاديمية
Voltage-induced Interface Reconstruction and Electrical Instability of the Ferromagnet-Semiconductor Device
| العنوان: | Voltage-induced Interface Reconstruction and Electrical Instability of the Ferromagnet-Semiconductor Device |
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| المؤلفون: | Shu-Jui Chang, Po-Chun Chang, Wen-Chin Lin, Shao-Hua Lo, Liang-Chun Chang, Shang-Fan Lee, Yuan-Chieh Tseng |
| المصدر: | Scientific Reports, Vol 7, Iss 1, Pp 1-9 (2017) |
| بيانات النشر: | Nature Portfolio, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Medicine LCC:Science |
| مصطلحات موضوعية: | Medicine, Science |
| الوصف: | Abstract Using x-ray magnetic spectroscopy with in-situ electrical characterizations, we investigated the effects of external voltage on the spin-electronic and transport properties at the interface of a Fe/ZnO device. Layer-, element-, and spin-resolved information of the device was obtained by cross-tuning of the x-ray mode and photon energy, when voltage was applied. At the early stage of the operation, the device exhibited a low-resistance state featuring robust Fe-O bonds. However, the Fe-O bonds were broken with increasing voltage. Breaking of the Fe-O bonds caused the formation of oxygen vacancies and resulted in a high-resistance state. Such interface reconstruction was coupled to a charge-transfer effect via Fe-O hybridization, which suppressed/enhanced the magnetization/coercivity of Fe electronically. Nevertheless, the interface became stabilized with the metallic phase if the device was continuously polarized. During this stage, the spin-polarization of Fe was enhanced whereas the coercivity was lowered by voltage, but changes of both characteristics were reversible. This stage is desirable for spintronic device applications, owing to a different voltage-induced electronic transition compared to the first stage. The study enabled a straightforward detection of the spin-electronic state at the ferromagnet-semiconductor interface in relation to the transport and reversal properties during operation process of the device. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2045-2322 |
| Relation: | https://doaj.org/toc/2045-2322 |
| DOI: | 10.1038/s41598-017-00547-4 |
| URL الوصول: | https://doaj.org/article/a1c11dcd4e7f4d26b916a6adeefaba67 |
| رقم الأكسشن: | edsdoj.1c11dcd4e7f4d26b916a6adeefaba67 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20452322 |
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| DOI: | 10.1038/s41598-017-00547-4 |