Low-frequency broadband NMR on UPt3 using DC SQUIDs

Junyun Li; M. Digby; A. Casey; C. Lusher; B. Cowan; J. Saunders; D. Drung; T. Schurig; J. B. Kycia; J. I. Hong; D. N. Seidman; W. P. Halperin

doi:10.1016/S0921-4526(99)03009-4

Low-frequency broadband NMR on UPt₃ using DC SQUIDs

Junyun Li, M. Digby, A. Casey, C. Lusher, B. Cowan, J. Saunders^*, D. Drung, T. Schurig, J. B. Kycia, J. I. Hong, D. N. Seidman, W. P. Halperin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An NMR spectrometer has been constructed based on a DC SQUID with additional positive feedback, operating in flux locked loop mode. The system has an overall bandwidth of 3MHz and a coupled energy sensitivity of 800h. The spectrometer is being used to study high-quality single-crystal samples of UPt₃, in order to investigate the superconducting order parameter. NMR signals have been observed in the superconducting mixed state at significantly lower frequencies than hitherto, down to 100 kHz.

Original language	English (US)
Pages (from-to)	2107-2108
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART II
DOIs	https://doi.org/10.1016/S0921-4526(99)03009-4
State	Published - 2000

Funding

This work was supported by EPSRC (United Kingdom), Grant GR/L11915, and by NSF (USA), Grant DMR-9705473.

Keywords

DC SQUID
NMR
UPt

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(99)03009-4

Cite this

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title = "Low-frequency broadband NMR on UPt3 using DC SQUIDs",

abstract = "An NMR spectrometer has been constructed based on a DC SQUID with additional positive feedback, operating in flux locked loop mode. The system has an overall bandwidth of 3MHz and a coupled energy sensitivity of 800h. The spectrometer is being used to study high-quality single-crystal samples of UPt3, in order to investigate the superconducting order parameter. NMR signals have been observed in the superconducting mixed state at significantly lower frequencies than hitherto, down to 100 kHz.",

keywords = "DC SQUID, NMR, UPt",

author = "Junyun Li and M. Digby and A. Casey and C. Lusher and B. Cowan and J. Saunders and D. Drung and T. Schurig and Kycia, {J. B.} and Hong, {J. I.} and Seidman, {D. N.} and Halperin, {W. P.}",

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doi = "10.1016/S0921-4526(99)03009-4",

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journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Low-frequency broadband NMR on UPt3 using DC SQUIDs

AU - Li, Junyun

AU - Digby, M.

AU - Casey, A.

AU - Lusher, C.

AU - Cowan, B.

AU - Saunders, J.

AU - Drung, D.

AU - Schurig, T.

AU - Kycia, J. B.

AU - Hong, J. I.

AU - Seidman, D. N.

AU - Halperin, W. P.

PY - 2000

Y1 - 2000

N2 - An NMR spectrometer has been constructed based on a DC SQUID with additional positive feedback, operating in flux locked loop mode. The system has an overall bandwidth of 3MHz and a coupled energy sensitivity of 800h. The spectrometer is being used to study high-quality single-crystal samples of UPt3, in order to investigate the superconducting order parameter. NMR signals have been observed in the superconducting mixed state at significantly lower frequencies than hitherto, down to 100 kHz.

AB - An NMR spectrometer has been constructed based on a DC SQUID with additional positive feedback, operating in flux locked loop mode. The system has an overall bandwidth of 3MHz and a coupled energy sensitivity of 800h. The spectrometer is being used to study high-quality single-crystal samples of UPt3, in order to investigate the superconducting order parameter. NMR signals have been observed in the superconducting mixed state at significantly lower frequencies than hitherto, down to 100 kHz.

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KW - NMR

KW - UPt

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