Giant tunnel magnetoresistance in codeposited fullerene-cobalt films in the low bias-voltage regime

被引：29

作者：

Sakai, Seiji ^{[1
]}

Sugai, Isamu ^{[2
]}

Mitani, Seiji ^{[2
]}

Takanashi, Koki ^{[2
]}

Matsumoto, Yoshihiro ^{[1
]}

Naramoto, Hiroshi ^{[1
]}

Avramov, Pavel V. ^{[1
]}

Okayasu, Satoru ^{[1
]}

Maeda, Yoshihito ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 24期

关键词：

D O I：

10.1063/1.2822397

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetotransport properties in the low bias-voltage regime were investigated for codeposited C-60-Co films. A giant tunnel magnetoresistance (MR) ratio (Delta R/R-max) of 80%, which is the highest in ferromagnetic metal/organic molecule systems, was found at low temperatures. The observed bias-voltage dependence of the MR ratio is expressed by an unusual exponential form, suggesting that the MR ratio of nearly 100% can be realized in the low bias-voltage limit. (c) 2007 American Institute of Physics.

引用

页数：3

共 20 条

[1]

ABELES B, 1975, ADV PHYS, V24, P407, DOI 10.1080/00018737500101431

[2] Half-metallic properties of atomic chains of carbon-transition-metal compounds [J].

Dag, S ;

Tongay, S ;

Yildirim, T ;

Durgun, E ;

Senger, RT ;

Fong, CY ;

Ciraci, S .

PHYSICAL REVIEW B, 2005, 72 (15)

[3] Transformation of spin information into large electrical signals using carbon nanotubes [J].

Hueso, Luis E. ;

Pruneda, Jose M. ;

Ferrari, Valeria ;

Burnell, Gavin ;

Valdes-Herrera, Jose P. ;

Simons, Benjamin D. ;

Littlewood, Peter B. ;

Artacho, Emilio ;

Fert, Albert ;

Mathur, Neil D. .

NATURE, 2007, 445 (7126) :410-413

[4] Theory of tunneling magnetoresistance in granular magnetic films [J].

Inoue, J ;

Maekawa, S .

PHYSICAL REVIEW B, 1996, 53 (18) :11927-11929

[5] Structure and magnetism of well defined cobalt nanoparticles embedded in a niobium matrix [J].

Jamet, M ;

Dupuis, V ;

Mélinon, P ;

Guiraud, G ;

Pérez, A ;

Wernsdorfer, W ;

Traverse, A ;

Baguenard, B .

PHYSICAL REVIEW B, 2000, 62 (01) :493-499

[6]

Klauk H., 2006, ORGANIC ELECT MAT MA, P1

[7] Enhanced magnetoresistance in insulating granular systems: Evidence for higher-order tunneling [J].

Mitani, S ;

Takahashi, S ;

Takanashi, K ;

Yakushiji, K ;

Maekawa, S ;

Fujimori, H .

PHYSICAL REVIEW LETTERS, 1998, 81 (13) :2799-2802

[8] Spin-dependent transport in C60-Co nano-composites [J].

Miwa, Shinji ;

Shiraishi, Masashi ;

Mizuguchi, Masaki ;

Shinjo, Teruya ;

Suzuki, Yoshishige .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2006, 45 (24-28) :L717-L719

[9] Magnetization process of noninteracting ferromagnetic cobalt nanoparticles in the superparamagnetic regime: Deviation from Langevin law [J].

Respaud, M .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (01) :556-561

[10] Polymeric Co-C60 compound phase evolved in atomistically mixed thin films [J].

Sakai, S ;

Naramoto, H ;

Lavrentiev, V ;

Narumi, K ;

Maekawa, M ;

Kawasuso, A ;

Yaita, T ;

Baba, Y .

MATERIALS TRANSACTIONS, 2005, 46 (04) :765-768

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