Structure and magneto-electrical properties of Fe-C films prepared by magnetron sputtering

被引：6

作者：

Ma Lei ^{[1
,2
]}

Liu ZhongWu ^{[1
]}

Zeng DeChang ^{[1
]}

Yu HongYa ^{[1
]}

Zhong XiaPing ^{[1
]}

Zhang XiaoZhong ^{[3
]}

机构：

[1] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

[2] Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China

[3] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2012年 / 55卷 / 09期

基金：

中国国家自然科学基金;

关键词：

carbon films; Fe-doped DLC films; magnetoresistance; magnetron sputtering; AMORPHOUS-CARBON FILMS; FEMTOSECOND LASER-ABLATION; POSITIVE MAGNETORESISTANCE; THIN-FILMS; TRANSPORT-PROPERTIES; COBALT NANOCRYSTALS; GRANULAR FILMS; NANOPARTICLES; SILICON; GRAPHITE;

D O I：

10.1007/s11433-012-4763-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fe-doped amorphous Fe (x) C1-x granular films were prepared on n-Si (100) substrates by d.c. magnetron sputtering. The structural properties of Fe (x) C1-x films were investigated by X-ray diffraction (XRD), atomic force microscope (AFM) and Raman spectroscopy. The results show that the iron and carbon of as-deposited films are in amorphous state, and the Fe (x) C1-x films are diamond-like carbon (DLC) films. After doping iron into the DLC films, a smooth surface morphology of the Fe (x) C1-x films has been obtained with the surface roughness Ra of about 0.231 nm for x=18at%. The Fe (x) C1-x films have good soft magnetic properties with the coercivity of approximately 20 Oe. A high positive magnetoresistance (MR) up to 93% with x=1at% was observed in a Fe (x) C1-x granular film at 300 K. The resistance characteristic of Fe-C films is changed at about 230 K and the positive MR effect can be understood by the p-n heterojunction theory.

引用

页码：1594 / 1598

页数：5

共 25 条

[11] Facile fabrication of composites of platinum nanoparticles and amorphous carbon films by catalyzed carbonization of cellulose fibers [J].

He, JH ;

Kunitake, T ;

Nakao, A .

CHEMICAL COMMUNICATIONS, 2004, (04) :410-411

[12] Effect of annealing on the structure and magnetic properties of graphite encapsulated nickel and cobalt nanocrystals [J].

Host, JJ ;

Block, JA ;

Parvin, K ;

Dravid, VP ;

Alpers, JL ;

Sezen, T ;

LaDuca, R .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (02) :793-801

[13] Carbon encapsulated nanoparticles of Ni, Co, Cu, and Ti [J].

Jiao, J ;

Seraphin, S .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (05) :2442-2448

[14] Mechanical properties of Ti-containing and W-containing diamond-like carbon coatings [J].

Meng, WJ ;

Gillispie, BA .

JOURNAL OF APPLIED PHYSICS, 1998, 84 (08) :4314-4321

[15] Annealing effects on the structure and magnetic properties of Fe-C granular films [J].

Mi, WB ;

Li, ZQ ;

Wu, P ;

Jiang, EY ;

Bai, HL .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (30) :5569-5582

[16] Atomic-to-mesoscopic scale structural transition in metal-carbon diamondlike composites probed by second-harmonic generation [J].

Murzina, TV ;

Kapra, RV ;

Aktsipetrov, OA ;

Dorfman, VF .

APPLIED PHYSICS LETTERS, 2003, 83 (23) :4749-4751

[17] Tribological properties of copper/carbon films formed by microwave plasma-assisted deposition techniques [J].

Pauleau, Y ;

Thièry, E ;

Uglov, V ;

Anishchik, V ;

Kuleshov, AK ;

Samtsov, MP .

SURFACE & COATINGS TECHNOLOGY, 2004, 180 :102-107

[18] SINGLE-CRYSTAL METALS ENCAPSULATED IN CARBON NANOPARTICLES [J].

RUOFF, RS ;

LORENTS, DC ;

CHAN, B ;

MALHOTRA, R ;

SUBRAMONEY, S .

SCIENCE, 1993, 259 (5093) :346-348

[19] Tetrahedral amorphous carbon-silicon heterojunction band energy offsets [J].

Rupesinghe, NL ;

Cole, RJ ;

Chhowalla, M ;

Amaratunga, GAJ ;

Weightman, P .

[20] Enhanced room-temperature positive magnetoresistance of a-C:Fe film [J].

Tian, P. ;

Zhang, X. ;

Xue, Q. Z. .

CARBON, 2007, 45 (09) :1764-1768

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