Biskyrmion states and their current-driven motion in a layered manganite

被引：257

作者：

Yu, X. Z. ^{[1
]}

Tokunaga, Y. ^{[1
]}

Kaneko, Y. ^{[1
]}

Zhang, W. Z. ^{[2
]}

Kimoto, K. ^{[2
]}

Matsui, Y. ^{[2
]}

Taguchi, Y. ^{[1
]}

Tokura, Y. ^{[1
,3
,4
]}

机构：

[1] RIKEN, CEMS, Wako, Saitama 3510198, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[4] Univ Tokyo, QPEC, Tokyo 1138656, Japan

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

关键词：

REAL-SPACE OBSERVATION; SKYRMION LATTICE; SPIN TRANSFER; TORQUES; MNSI;

D O I：

10.1038/ncomms4198

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The magnetic skyrmion is a topologically stable spin texture in which the constituent spins point to all the directions wrapping a sphere. Generation and control of nanometric magnetic skyrmions have large potential, for example, reduced power consumption, in spintronics device applications. Here we show the real-space observation of a biskyrmion, as defined by a molecular form of two bound skyrmions with the total topological charge of 2, realized under magnetic field applied normal to a thin plate of a bilayered manganite with centrosymmetric structure. In terms of a Lorentz transmission electron microscopy (TEM), we have observed a distorted-triangle lattice of biskyrmion crystal, each composed of two bound skyrmions with oppositely swirling spins (magnetic helicities). Furthermore, we demonstrate that these biskyrmions can be electrically driven with orders of magnitude lower current density (<10(8) A m(-2)) than that for the conventional ferromagnetic domain walls.

引用

页数：7