| Original Articles |
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Nano-sized Domain Wall Pinning Effects in Dilute Cu-Doped Perovskite LaMn1-xCuxO3 Manganites |
| GAO Tian1, CAO Shi-Xun1, ZHANG Jin-Cang1, YU Li-Ming1,KANG Bao-Juan1, YUAN Shu-Juan 1,2 |
| 1Department of Physics, Shanghai University, Shanghai 2004442National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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GAO Tian, CAO Shi-Xun, ZHANG Jin-Cang et al 2008 Chin. Phys. Lett. 25 3410-3413 |
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Abstract Magnetic properties of Cu-doped LaMn1-xCuxO3 (x=0.05--0.30) systems are carefully studied in the temperature range of 2--300K. A visible unexpected drop is observed in the ac susceptibility and the zero-field cooled dc magnetization curves for the dilute x≤0.10 near 100K, which depends on the measuring frequency and magnetic field. Measurements on frequency dependence of ac susceptibility, observation of magnetic relaxation, and the existence of critical field indicate that the anomaly can be attributed to the domain wall pinning effects. This is directly proven by the results of ball milled nano-sized powder counterparts compared with the bulk materials.
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| Keywords:
75.47.Lx
75.30.-m
75.60.-d
75.50.-y
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Received: 26 March 2008
Published: 29 August 2008
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| PACS: |
75.47.Lx
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(Magnetic oxides)
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75.30.-m
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(Intrinsic properties of magnetically ordered materials)
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75.60.-d
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(Domain effects, magnetization curves, and hysteresis)
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75.50.-y
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(Studies of specific magnetic materials)
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