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首页> 外文期刊>Physica, B. Condensed Matter >Structure evolution, magnetic domain structures and magnetic properties of CoPt-C nanocomposite films
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Structure evolution, magnetic domain structures and magnetic properties of CoPt-C nanocomposite films

机译：CoPt-C纳米复合薄膜的结构演变，磁畴结构和磁性能

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CoPt-C nanocomposite thin films with various carbon concentrations were prepared by a pulsed filtered vacuum arc deposition technique. Annealing was performed in vacuum for 1 h at various temperatures. The structure evolution and magnetic properties of the films were characterized by non-Rutherford backscattering spectrometry, X-ray diffraction, magnetic force microscopy and vibrating sample magnetometer. The as-deposited samples are magnetic soft with face-central-cubic phase CoPt nanocrystals encapsulated in carbon matrix. After annealing at a sufficiently high temperature, depending on the carbon composition, the CoPt nanocrystals transform to a face-centered-tetragonal phase. For the film with a particular composition of (Co0.44Pt0.56)(0.55)C-0.45, the coercivity is observed to increase with increasing annealing temperature, up to a value of 7 kOe at an annealing temperature of 750degreesC, and the grain size increases from 9 to 20 nm. (C) 2004 Elsevier B.V. All rights reserved.
机译：通过脉冲过滤真空电弧沉积技术制备了具有各种碳浓度的CoPt-C纳米复合薄膜。在各种温度下于真空中退火1小时。通过非卢瑟福背散射光谱，X射线衍射，磁力显微镜和振动样品磁强计对薄膜的结构演变和磁性进行了表征。沉积后的样品是软磁性的，面心立方相CoPt纳米晶体封装在碳基质中。在足够高的温度下退火后，取决于碳的组成，CoPt纳米晶体转变为面心四方相。对于具有特定成分（Co0.44Pt0.56）（0.55）C-0.45的薄膜，观察到矫顽力随退火温度的升高而增加，在750°C的退火温度下矫顽力达到7 kOe。尺寸从9纳米增加到20纳米。 （C）2004 Elsevier B.V.保留所有权利。

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