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Giant Low-Field Magnetoresistance in Polycrystalline La2/3Ca1/3Mn1-xCuxO3 Sintered at 1100 ℃ 夏正才1,刘洁1,袁松柳1,张国庆1,杨应平1 (1.Department of Physics,Huazhong University of Science and Technology, Wuhan..., conductive mechanism and low-field magnetoresistance (MR0) were investigated. It is found that conductive mechanism is described by Mott′s variable-range hopping and the MR0 near the insulator-metal......
最佳的磁性能,此时膜层中的单磁畴磁性粒子有助于提高巨磁电阻值.CuCo颗粒膜电沉积制备过程中施加磁场可以改善膜层的微观结构,使其具有更高的巨磁电阻效应. 关键词:CuCo颗粒膜;巨磁电阻效应;磁场;电沉积 中图分类号:TQ 153.2 文献标识码:A Giant magnetoresistance of CuCo granular... magnetoresistance and magnetic property of the films were studied. The composition and structure of the plating films were studied by XRD. The giant magnetoresistance of the films was measured by the four line......
-spin-valve (PSV) sandwiches using amorphous CoNbZr alloy as soft magnetic layer were fabricated by magnetron sputtering. The giant magnetoresistance (GMR) and its dependence on the thickness...: giant magnetoresistance; pseudo-spin-valve; amorphous ferromagnetic layer; Camley-Barnas model 1 Introduction Pseudo-spin-valve (PSV) sandwiches using very thin amorphous film as soft layer......
, et al. Effect of particle size on the giant magnetoresistance of La0.7Ca0.3MnO3 [J]. Appl Phys Lett, 1996, 68: 2291-2293. [8]Chechersky V, Nath A, Isaac I, et al. Evidence for breakdown.... Tunnel-type giant magnetoresistance in the granular perovskite La0.85Sr0.15MnO3 [J]. Phys Rev B, 1997, 56: 8138-8142. [13]HUANG Zhi-gao, CHEN Zhi-gao, PENG Kun, et al. Monte Carlo simulation of tunneling......
[1]Dieny B. Giant magnetoresistance in spin-valve multilayers [J]. J Magn Magn Mater, 1994, 136(3): 335-359. [2]Wang D, Daughton J M, Smith C H, et al. Effect of Au underlayers on GMR properties.... [14]Endo Y, Kitakami O, Shimada Y. Measurement of perpendicular giant magnetoresistance of Fe/Si superlattices [J]. Appl Phys Lett, 1998, 72: 495-497. [15]Chen G. New longitudinal recording media......
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results show that the amorphous Fe3O4 films exhibit a superparamagnetic response at a large-scale from 20 nm to 150 nm, and the magnetoresistance (MR) isn’t detected. By contrast, the polycrystalline Fe3O4 films possess large saturation magnetization Ms of 420 A/(kg?cm) and a clear magnetoresistance with a field of 40 kA/m. The unusual properties for the amorphous Fe3O4 film are attributed......
, Buffalo, NY 14260, USA Received 10 April 2006; accepted 25 April 2006 Abstract: Recent work on magnetic quantum point contacts (QPCs) was discussed. Complete magnetoresistance loops across Co QPCs as small as a single atom was measured. The remarkable feature of these QPCs is the rapid oscillatory decay in magnetoresistance with the increase of contact size. In addition, stepwise or quantum......
Influence of Pr Content on the Sructure and Giant Magnetoresistance of Prx(Co40Ag60)100-x Granular Films成钢摘 要:Prx(Co40Ag60)100-x (x=0, 0.5, 1, 1.5, 2, 3) granular films have been prepared by DC magneto controlled sputtering method. The XRD data indicated that Pr element favors the (111) plane preferential orientation. Magnetic measurements indicate......
SPIN-DEPENDENT TUNNELING MAGNETORESISTANCE IN Fe-O/AlOx/Fe-O FILMS S.Luo1,P.Wu1,L.Q.Pan1,Y.Tian1,H.Qiu1,F.P.Wang1 (1.Beijing Keda-Tianyu Microelectronic Materials Technology Development Co. Ltd... structrure of α-Fe is observed in both electrodes. Largetunnel magnetoresistance in large Fe-O/AlOx/Fe-O junctions of 1cm2 is observed atroom temperature and the Ⅰ-Ⅴ characteristic curve of the junction......