Force-gradient detected nuclear magnetic resonance

被引：49

作者：

Garner, SR ^{[1
]}

Kuehn, S

Dawlaty, JM

Jenkins, NE

Marohn, JA

机构：

[1] Cornell Univ, Ctr Nanoscale Syst, Ithaca, NY 14853 USA

[2] Cornell Univ, Dept Chem & Biol Chem, Ithaca, NY 14853 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 25期

关键词：

D O I：

10.1063/1.1762700

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have detected nuclear magnetic resonance in GaAs by selectively inverting Ga-71 spins to create a local force gradient which shifts the mechanical resonance frequency of a nearby magnet tipped microcantilever. Employing a low spring constant cantilever (60 muN/m) at 4.4 K and 7 T, we demonstrate a magnetic moment sensitivity of 7.5x10(-21) J/T, equal to the Curie Law magnetization from 7.1x10(8) Ga-71 spins. The method obviates the need to spin-lock sample magnetization during detection, allowing the signal to be collected for a time approaching the full spin-lattice relaxation time. (C) 2004 American Institute of Physics.

引用

页码：5091 / 5093

页数：3

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