Very low frequency SQUID NMR measurements of two-dimensional solid 3He films

被引：0
|
作者：
Casey, A [1 ]
Lusher, C [1 ]
Cowan, B [1 ]
Saunders, J [1 ]
机构：
[1] Univ London Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England
来源：
PHYSICA B-CONDENSED MATTER | 2003年 / 329卷
关键词：
helium films; SQUID NMR; low-dimensional magnetism;
D O I：
10.1016/S0921-4526(02)01944-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Pulsed NMR measurements have been performed on He-3 films adsorbed on an exfoliated graphite sample of area 2 m(2). The spectrometer is constructed using a DC SQUID amplifier, with additional positive feedback, and bandwidth 3.4 MHz. The input circuit is a superconducting flux transformer and so is intrinsically broadband. The static magnetic field is provided by a superconducting solenoid enclosed in a niobium. shield. We report measurements at the "ferromagnetic anomaly" at frequencies below 50 kHz. A narrow C-13 line is also observed, which can be used to directly measure the temperature of the substrate. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：148 / 149
页数：2
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