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

[1] Generation of silicon nanoparticles via femtosecond laser ablation in vacuum [J].

Amoruso, S ;

Bruzzese, R ;

Spinelli, N ;

Velotta, R ;

Vitiello, M ;

Wang, X ;

Ausanio, G ;

Iannotti, V ;

Lanotte, L .

APPLIED PHYSICS LETTERS, 2004, 84 (22) :4502-4504

[2] Magnetic and morphological characteristics of nickel nanoparticles films produced by femtosecond laser ablation [J].

Ausanio, G ;

Barone, AC ;

Iannotti, V ;

Lanotte, L ;

Amoruso, S ;

Bruzzese, R ;

Vitiello, M .

APPLIED PHYSICS LETTERS, 2004, 85 (18) :4103-4105

[3] Structural and magnetic properties of Fex-C1-x nanocomposite thin films [J].

Babonneau, D ;

Briatico, J ;

Petroff, F ;

Cabioc'h, T ;

Naudon, A .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (07) :3432-3443

[4] Finite-size effects in fine particles: magnetic and transport properties [J].

Batlle, X ;

Labarta, A .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2002, 35 (06) :R15-R42

[5]

Bewilogua K, 2000, SURF COAT TECH, V127, P224, DOI 10.1016/S0257-8972(00)00666-6

[6] Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon [J].

Branford, WR ;

Clowes, SK ;

Syed, MH ;

Bugoslavsky, YV ;

Gardelis, S ;

Androulakis, J ;

Giapintzakis, J ;

Grigorescu, CEA ;

Berenov, AV ;

Roy, SB ;

Cohen, LF .

APPLIED PHYSICS LETTERS, 2004, 84 (13) :2358-2360

[7] Channel switching and magnetoresistance of a metal-SiO2-Si structure [J].

Dai, J ;

Spinu, L ;

Wang, KY ;

Malkinski, L ;

Tang, J .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (11) :L65-L67

[8] Interpretation of Raman spectra of disordered and amorphous carbon [J].

Ferrari, AC ;

Robertson, J .

PHYSICAL REVIEW B, 2000, 61 (20) :14095-14107

[9] Raman spectroscopy of graphene and graphite: Disorder, electron-phonon coupling, doping and nonadiabatic effects [J].

Ferrari, Andrea C. .

SOLID STATE COMMUNICATIONS, 2007, 143 (1-2) :47-57

[10] Magnetic thin films of cobalt nanocrystals encapsulated in graphite-like carbon [J].

Hayashi, T ;

Hirono, S ;

Tomita, M ;

Umemura, S .

NATURE, 1996, 381 (6585) :772-774

← 1 2 3 →