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首页> 外文会议>NATO Advanced Study Institute on Magnetic Storage Systems Beyond 2000, Jun 25-Jul 7, 2000, Rhodes, Greece >LASER IRRADIATION EFFECTS ON MICROSTRUCTURE AND MAGNETO-TRANSPORT PROPERTIES OF PLD Co_(0.08)-Ag_(0.92) FILMS
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LASER IRRADIATION EFFECTS ON MICROSTRUCTURE AND MAGNETO-TRANSPORT PROPERTIES OF PLD Co_(0.08)-Ag_(0.92) FILMS

机译：激光辐照对PLD Co_（0.08）-Ag_（0.92）薄膜的微观结构和磁传输性能的影响

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摘要

PLD Co_(0.08)-Ag_(0.92) films irradiated by excimer laser at different energy fluences have been studied. The as deposited samples showed a fraction of very small (φ< 10 nm) Co particles which determines a magnetic and transport behaviour typical of an ensamble of superparamagnetic grains. After irradiation, Ag grains size increases up to 50 nm and a Co nucleation at the Ag grains boundaries has been observed. After laser annealing and in the low field region (H < 1 kOe) the field sensitivity (δGMR/δH) of the irradiated samples increases by a factor 2 in the whole investigated temperature range (10 - 300 K). The presence of a small fraction of blocked Co nanoparticles can be related with the increase of GMR sensitivity.
机译：研究了受激准分子激光在不同能量注量下辐照的PLD Co_（0.08）-Ag_（0.92）薄膜。所沉积的样品显示出非常小的（φ<10 nm）Co颗粒分数，该颗粒决定了超顺磁性晶粒堆积所特有的磁性和传输行为。辐照后，Ag晶粒尺寸增加到50 nm，并且在Ag晶粒边界处观察到Co成核。激光退火后，在低场区域（H <1 kOe），在整个研究温度范围（10-300 K）中，被辐照样品的场灵敏度（δGMR/δH）增加2倍。一小部分封闭的Co纳米颗粒的存在可能与GMR敏感性的增加有关。

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