中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Enhancement of the Curie temperature of the amorphous intergranular phase in Sm-Fe-Ga-C nanocomposite permanent magnetic materials

文献类型:期刊论文

作者Cheng, ZH ; Zhang, JX ; Kronmuller, H ; Dunlap, RA ; Shen, BG
刊名JOURNAL OF PHYSICS-CONDENSED MATTER
出版日期2003
卷号15期号:2页码:267
关键词NANOSCALE HETEROGENEOUS SYSTEMS FERROMAGNETIC PHASES REMANENCE ALLOYS
ISSN号0953-8984
通讯作者Cheng, ZH: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, POB 603, Beijing 100080, Peoples R China.
中文摘要The magnetic properties of the nanocomposite permanent magnetic materials Sm-Fe-Ga-C have been investigated. As-quenched SM2Fe18Ga2C2.2 samples, prepared with a substrate velocity nu(s) = 18.5 and 19.5 m s(-1) contain some amorphous intergranular phase, together with Sm2Fe15Ga2C2.2 (Th2Zn17-type structure) and alpha-Fe. On the basis of the compositional dependence of the Curie temperature in Sm2Fe15+xGa2C2.2 amorphous ribbons, an enhancement of the Curie temperature of the amorphous intergranular phase (aip) was found in nanocomposite alloys with respect to amorphous ribbons of the same composition. Fe-57 magnetic hyperfine field distributions for the amorphous intergranular amorphous phase are narrower than those for the amorphous ribbon. No difference was found in average hyperfine field, and hence in Fe magnetic moment, within the experimental error. We also excluded the effect of compositional difference on Curie temperature. The enhancement of the Curie temperature is thus concluded to originate from the penetration of the molecular field of crystallized magnetic phases into the amorphous intergranular region. Finally, a theoretical model was proposed to explain the mechanism of 'extra' enhancement of the Curie temperature.
收录类别SCI
语种英语
公开日期2013-09-17
源URL[http://ir.iphy.ac.cn/handle/311004/37443]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Cheng, ZH,Zhang, JX,Kronmuller, H,et al. Enhancement of the Curie temperature of the amorphous intergranular phase in Sm-Fe-Ga-C nanocomposite permanent magnetic materials[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2003,15(2):267.
APA Cheng, ZH,Zhang, JX,Kronmuller, H,Dunlap, RA,&Shen, BG.(2003).Enhancement of the Curie temperature of the amorphous intergranular phase in Sm-Fe-Ga-C nanocomposite permanent magnetic materials.JOURNAL OF PHYSICS-CONDENSED MATTER,15(2),267.
MLA Cheng, ZH,et al."Enhancement of the Curie temperature of the amorphous intergranular phase in Sm-Fe-Ga-C nanocomposite permanent magnetic materials".JOURNAL OF PHYSICS-CONDENSED MATTER 15.2(2003):267.

入库方式: OAI收割

来源:物理研究所

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