| Ferromagnetic Antiresonance and Giant Microwave Magneto-Impedance in Polycrystalline La0.49Sr0.51MnO3 |
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| 作者姓名： | 柳文军 舒启清 S. M. BHAGAT I. O. TROYANCHUK |
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| 作者单位： | [1]College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060 [2]Shenzhen Key Laboratory of Special Functional Materials, Shenzhen 518060 [3]Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA [4]Institute of Solid State and Semiconductor Physics, National Academy of Sciences of Belarus, P. Brovki Street 17, Minsk 220072, Belarus |
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| 基金项目： | Supported by the Science and Technology Foundation of Shenzhen under Grand Nos 200604 and 200606. |
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| 摘 要： | The ferromagnetic antiresonance （FMAR） phenomenon, i.e., the minimum of the microwave absorption, in polycrystalline La0.49Sr0.51MnO3 is observed near Curie temperature TC = 282 K. Temperature-dependences of magnetization μ0M are obtained from the FMAR. The results show that as μ0H = 0, by fitting the scaling law M ∝ （TC -T）^β to temperature-dependences of μ0M at the different microwave frequencies, it yields TC=281.2 K and β = 0.47. However, temperature-dependences of μ0M under different μ0H are not in agreement with the scaling law. Due to FMAR, about 40% giant microwave magneto-impedance at 11.9 GHz can occur under a low field μ0H = 0.03 T.
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| 关 键 词： | 铁磁性质 反共振 微波 磁发电机 |
| 收稿时间： | 2007-08-23 |
Ferromagnetic Antiresonance and Giant Microwave Magneto-Impedance in Polycrystalline La0.49Sr0.51MnO3 |
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| LIU Wen-Jun,SHU Qi-Qing,S. M. BHAGAT,I. O. TROYANCHUK.Ferromagnetic Antiresonance and Giant Microwave Magneto-Impedance in Polycrystalline La0.49Sr0.51MnO3[J].Chinese Physics Letters,2008,25(3):1124-1127. |
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| Authors: | LIU Wen-Jun SHU Qi-Qing S M BHAGAT I O TROYANCHUK |
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| Affiliation: | College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060 Shenzhen Key Laboratory of Special Functional Materials, Shenzhen 518060Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USAInstitute of Solid State and Semiconductor Physics, National Academy of Sciences of Belarus, P. Brovki Street 17, Minsk 220072, Belarus |
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| Abstract: | |
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| Keywords: | 78 70 Gq 76 50 +g 75 47 Gk |
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