Bistability in Atomic-Scale Antiferromagnets

被引：529

作者：

Loth, Sebastian ^{[1
,2
,3
]}

Baumann, Susanne ^{[1
,4
]}

Lutz, Christopher P. ^{[1
]}

Eigler, D. M. ^{[1
]}

Heinrich, Andreas J. ^{[1
]}

机构：

[1] IBM Res Div, Almaden Res Ctr, San Jose, CA 95120 USA

[2] Max Planck Res Grp Dynam Nanoelect Syst, Ctr Free Electron Laser Sci, Hamburg, Germany

[3] Max Planck Inst Solid State Res, Stuttgart, Germany

[4] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

来源：

SCIENCE | 2012年 / 335卷 / 6065期

关键词：

SPIN; MAGNETIZATION; RESOLUTION; EXCHANGE;

D O I：

10.1126/science.1214131

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：

Control of magnetism on the atomic scale is becoming essential as data storage devices are miniaturized. We show that antiferromagnetic nanostructures, composed of just a few Fe atoms on a surface, exhibit two magnetic states, the Neel states, that are stable for hours at low temperature. For the smallest structures, we observed transitions between Neel states due to quantum tunneling of magnetization. We sensed the magnetic states of the designed structures using spin-polarized tunneling and switched between them electrically with nanosecond speed. Tailoring the properties of neighboring antiferromagnetic nanostructures enables a low-temperature demonstration of dense nonvolatile storage of information.

引用

页码：196 / 199

页数：4

共 30 条

[1] MACROSCOPIC QUANTUM TUNNELING IN ANTIFERROMAGNETS [J].