Academic Journal
Phase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 ≤ x ≤ 0.3) manganite oxides
| العنوان: | Phase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 ≤ x ≤ 0.3) manganite oxides |
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| المؤلفون: | Gao, J, Wang, L, Guo, EJ, Wu, ZP, Jin, KJ, Lu, HB |
| بيانات النشر: | //jap.aip.org/jap/staff.jsp United States |
| سنة النشر: | 2011 |
| المجموعة: | University of Hong Kong: HKU Scholars Hub |
| الوصف: | The effects of tetravalent hafnium doping on the structural, transport, and magnetic properties of polycrystalline La1−xHfxMnO3 (LHMO) (0.05 ≤ x ≤ 0.3) were investigated systematically. LHMO exhibited a typical colossal magnetoresistance effect via the double-exchange between Mn2+ and Mn3+ ions, instead of that between Mn3+ and Mn4+ ions in hole-doped manganites. A phase diagram was obtained for the first time through magnetization and resistance measurements in a broad temperature range. As the Hf concentration varied from x = 0.05 to 0.3, the Curie point and metal-to-insulator transition temperature increased significantly, whereas the magnetization and resistivity decreased remarkably. An abnormal enhancement of the magnetization was observed at about 42 K. It was further confirmed that a second magnetic phase MnO2 in LHMO gives rise to such a phenomenon. The possible causes are discussed in detail. The dynamic magnetic properties of LHMO, including relaxation and aging processes, were studied, demonstrating a spin-glass state at low temperature accompanied by a ferromagnetic phase. ; published_or_final_version |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0021-8979 |
| Relation: | Journal of Applied Physics; Journal of Applied Physics, 2011, v. 110 n. 11, article no. 113914; 198691; WOS:000298254800088; 11, article no. 113914; eid_2-s2.0-84859339804; http://hdl.handle.net/10722/145578; 110 |
| DOI: | 10.1063/1.3666056 |
| الاتاحة: | https://doi.org/10.1063/1.3666056 http://hdl.handle.net/10722/145578 |
| Rights: | Copyright (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 (Journal of Applied Physics, 2011, v. 110 n. 11, article no. 113914) and may be found at (http://jap.aip.org/resource/1/japiau/v110/i11/p113914_s1). ; This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
| رقم الانضمام: | edsbas.C0B19422 |
| قاعدة البيانات: | BASE |
| تدمد: | 00218979 |
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| DOI: | 10.1063/1.3666056 |