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Response of a mechanical oscillator in solid 4He

Research output: Contribution to journalJournal article

Published

Journal publication date04/2014
JournalJournal of Low Temperature Physics
Journal number1-2
Volume175
Number of pages7
Pages140-146
Early online date1/10/13
Original languageEnglish

Abstract

We present the first measurements of the response of a mechanical oscillator in solid 4He. We use a lithium niobate tuning fork operating in its fundamental resonance mode at a frequency of around 30 kHz. Measurements in solid 4He were performed close to the melting pressure. The tuning fork resonance shows substantial frequency shifts on cooling from around 1.5 K to below 10 mK. The response shows an abrupt change at the bcc-hcp transition. At low temperatures, below around 100 mK, the resonance splits into several overlapping resonances.

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This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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