MAGNETIC-RESONANCE OF A SMALL PLATINUM PARTICLE USING AN INTEGRATED DC SQUID

被引：24

作者：

NARASIMHAN, LR ^{[1
]}

TAKIGAWA, M ^{[1
]}

KETCHEN, MB ^{[1
]}

机构：

[1] IBM CORP,DIV RES,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

APPLIED PHYSICS LETTERS | 1994年 / 65卷 / 10期

关键词：

D O I：

10.1063/1.112102

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the detection of pulsed nuclear magnetic resonance in a single 50 mum particle of platinum metal at 4 K and in an applied field of 60 G. The flux from the processing spins is detected directly by an integrated dc SQUID minisusceptometer. The device can operate in applied fields of up to 100 G without degradation of noise performance. The particle contains almost-equal-to 10(15) spin-active nuclei while the signal intensity corresponds to flux from 2.5 x 10(14) spins all located at the center of the pickup loop. This result represents a significant improvement in the sensitivity of NMR and may be useful in the characterization of materials with small spin populations.

引用

页码：1305 / 1307

页数：3

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