Conductance quantization and magnetoresistance in magnetic point contacts

被引：114

作者：

Imamura, H ^{[1
]}

Kobayashi, N

Takahashi, S

Maekawa, S

机构：

[1] Tohoku Univ, CREST, Sendai, Miyagi 9808577, Japan

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

[3] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

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

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.84.1003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically study the electron transport through a magnetic point contact (PC) with special at tention given to the effect of an atomic scale domain wall (DW). The spin precession of a conduction electron is forbidden in such an atomic scale DW and the sequence of quantized conductances depends on the relative orientation of magnetizations between left and right electrodes. The magnetoresistance is strongly enhanced for the narrow PC and oscillates with the conductance.

引用

页码：1003 / 1006

页数：4

共 30 条

[21] QUANTIZED CONDUCTANCE IN AN ATOM-SIZED POINT-CONTACT
OLESEN, L
LAEGSGAARD, E
STENSGAARD, I
BESENBACHER, F
SCHIOTZ, J
STOLTZE, P
JACOBSEN, KW
NORSKOV, JK
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (14) : 2251 - 2254
[22] 2e2/h to e2/h switching of quantum conductance associated with a change in nanoscale ferromagnetic domain structure
Ono, T
Ooka, Y
Miyajima, H
Otani, Y
[J]. APPLIED PHYSICS LETTERS, 1999, 75 (11) : 1622 - 1624
[23] Spin-dependent conductance quantization in nickel point contacts
Oshima, H
Miyano, K
[J]. APPLIED PHYSICS LETTERS, 1998, 73 (15) : 2203 - 2205
[24] Atomic-sized metallic contacts: Mechanical properties and electronic transport
Rubio, G
Agrait, N
Vieira, S
[J]. PHYSICAL REVIEW LETTERS, 1996, 76 (13) : 2302 - 2305
[25] QUANTUM-THEORY OF DOMAIN-WALLS
SCHILLING, R
[J]. PHYSICAL REVIEW B, 1977, 15 (05): : 2700 - 2703
[26] CONDUCTANCE AND EXCHANGE COUPLING OF 2 FERROMAGNETS SEPARATED BY A TUNNELING BARRIER
SLONCZEWSKI, JC
[J]. PHYSICAL REVIEW B, 1989, 39 (10): : 6995 - 7002
[27] Ballistic electron transport through magnetic domain walls
van Hoof, JBAN
Schep, KM
Brataas, A
Bauer, GEW
Kelly, PJ
[J]. PHYSICAL REVIEW B, 1999, 59 (01) : 138 - 141
[28] QUANTIZED CONDUCTANCE OF POINT CONTACTS IN A TWO-DIMENSIONAL ELECTRON-GAS
VANWEES, BJ
VANHOUTEN, H
BEENAKKER, CWJ
WILLIAMSON, JG
KOUWENHOVEN, LP
VANDERMAREL, D
FOXON, CT
[J]. PHYSICAL REVIEW LETTERS, 1988, 60 (09) : 848 - 850
[29] ONE-DIMENSIONAL TRANSPORT AND THE QUANTIZATION OF THE BALLISTIC RESISTANCE
WHARAM, DA
THORNTON, TJ
NEWBURY, R
PEPPER, M
AHMED, H
FROST, JEF
HASKO, DG
PEACOCK, DC
RITCHIE, DA
JONES, GAC
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (08): : L209 - L214
[30] QUANTIZATION OF THE CONDUCTANCE OF BALLISTIC POINT CONTACTS BEYOND THE ADIABATIC APPROXIMATION
YACOBY, A
IMRY, Y
[J]. PHYSICAL REVIEW B, 1990, 41 (08): : 5341 - 5350

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