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退火、稀土Pr對(duì)Prx(Co40Ag60)100-x顆粒膜的結(jié)構(gòu)與巨磁電阻效應(yīng)的影響
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國家自然科學(xué)基金(50661002);廣西壯族自治區(qū)科技廳“自然科學(xué)基金”和“廣西信息材料重點(diǎn)實(shí)驗(yàn)室”(0575093& 0710908-11-Z);桂林電子科技大學(xué)重大項(xiàng)目(UF09011Y)


Influences of Annealing Temperature and Pr Content on the Structure and Giant Magnetoresistance of Prx(Co40Ag60)100-x Granular Films
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    摘要:

    采用磁控濺射法制備Prx(Co40Ag60)100-x顆粒膜。X射線衍射實(shí)驗(yàn)結(jié)果表明:稀土元素Pr有促進(jìn)薄膜中溶于Ag中的Co發(fā)生相分離的作用,并且在退火過程Ag顆粒的聚集生長具有(111)軸擇優(yōu)取向的顆粒膜;巨磁電阻(GMR)效應(yīng)測量結(jié)果表明:當(dāng)退火溫度小于或等于250 ℃時(shí),隨著Pr含量的增加,薄膜的GMR值先升后降,其峰值出現(xiàn)在x=0.5~1.0處。適量的Pr元素能夠增強(qiáng)GMR效應(yīng)以及提高GMR效應(yīng)對(duì)磁場的靈敏度,GMR效應(yīng)以及靈敏度的最大值分別為:–14.34%和0.67×10-3 (A/m)-1。

    Abstract:

    Prx(Co40Ag60)100-x (x=0, 0.5, 1, 1.5, 2, 3) granular films were prepared by a DC magnetron sputtering method. The XRD data indicate that Pr element can promote Co dissolving in Ag to separate from Ag and favors the (111) plane preferential orientation. Giant magnetoresistance (GMR) measurements indicate that the value of GMR increases at first and then decreases with increase of Pr content and the peak value appears at x=0.5-1.0 when the annealing temperature is below or equal to 250 oC. Proper addition of Pr to CoAg granular films can enhance GMR effect and the sensitivity to the magnetic field, whose maximum values are –14.34% and 0.67×10-3 (A/m)-1, respectively.

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成 鋼,吳 勇,顧正飛,成 鈞,鄭富強(qiáng),李銳鋒,鄧 婷.退火、稀土Pr對(duì)Prx(Co40Ag60)100-x顆粒膜的結(jié)構(gòu)與巨磁電阻效應(yīng)的影響[J].稀有金屬材料與工程,2011,40(6):1041~1044.[Cheng Gang, Wu Yong, Gu Zhengfei, Cheng Jun, Zheng Fuqiang, Li Ruifeng, Deng Ting. Influences of Annealing Temperature and Pr Content on the Structure and Giant Magnetoresistance of Prx(Co40Ag60)100-x Granular Films[J]. Rare Metal Materials and Engineering,2011,40(6):1041~1044.]
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  • 收稿日期:2010-06-26
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