在氩气气氛中用熔炼法制备了[Co80Fe10Ni10]20Cu80-xCrx系列Cu基巨磁电阻合金,通过光学显微镜、透射电子显微镜、场致发射扫描电镜和电子探针研究了[Co80Fe10Ni10]20Cu80-xCrx 合金在1000℃均匀化处理6h后水淬,以及随后的300~700℃,30~150min回火处理的微观结构及组分.用直流四探针法测量了合金的室温巨磁电阻效应(GMR).结果表明,合金在回火时从基体相中析出了高度弥散的含Fe、Ni、Co的纳米磁性新相.回火温度对合金的磁电阻效应影响很大,样品在600℃温度回火90min时,合金的室温GMR效应最好,可达8.61%.少量合金元素Cr的添加替代(Cr代Cu)消除了Co-Fe-Ni-Cu合金中的混溶裂隙,改善了合金的加工性但也降低了合金的磁电阻效应.
参考文献
[1] | Baibich M N;Broto J N;Fert A et al.[J].Physical Review Letters,1988,61(21):2472-2475. |
[2] | Parkin S S;More N;Roche K P .[J].Physical Review Letters,1990,64(14):2304-2307. |
[3] | Yu CT.;Yan ML.;Lai WY.;Wang ZX.;Li SX. .OSCILLATORY GMR IN SPUTTERED FE/AG MULTILAYERS[J].Journal of Magnetism and Magnetic Materials,1995(1):561-562. |
[4] | Berkowitz A E;Mitchell J R;Carey M J et al.[J].Physical Review Letters,1992,68(25):3745-3748. |
[5] | Xiao J Q;Jiang J S;Chien C L .[J].Physical Review Letters,1992,68(25):3749-3752. |
[6] | Xiong P;Xiao G;Wang J Q et al.[J].Physical Review Letters,1992,69(22):3220-3223. |
[7] | Tsoukatos A;Wan H;Hadjipanayis G C et al.[J].Journal of Applied Physics,1993,73(10):5509-5511. |
[8] | Jiang J S;Xiao J Q;Chien C L .[J].Applied Physics Letters,1992,61(19):2362-2364. |
[9] | Kitada M;Yamamoto K;Shimizu N .[J].Journal of Magnetism and Magnetic Materials,1993,124:243-245. |
[10] | Rubinstein M;Harris V G;Das B N et al.[J].Physical Review,1994,50(17):12550-12558. |
[11] | Martins CS.;Missell FP.;Rechenberg HR. .Giant magnetoresistance in granular CuFeNi alloys[J].Journal of Applied Physics,1998(11 Pt.2):7001-7003. |
[12] | Abeles B;Sheng P;Coutts M D et al.[J].ADVANCES IN PHYSICS,1975,24:407. |
[13] | WANG J Q;Xiao G .[J].Physical Review,1994,B49:3982-3996. |
[14] | Takeda H;Kataoka N;Fukamichi K et al.[J].Journal of Applied Physics,1994,33:L102-L105. |
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