NMR investigation of the magnetic susceptibility anisotropy in3He-A

Richard Haley, Allen Armstrong, Fergus Clancy, Antti Manninen, John Hook, Henry Hall

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

We have investigated transverse continuous wave NMR in a geometry where the modes are influenced by susceptibility anisotropy. The helium sample is separated by mylar foils into layers 12 μm thick perpendicular to the external dc magnetic field. In this geometry l is constrained to be parallel to the field and d switches from parallel to perpendicular to the field over a small range of field around the dipole unlocking field. The mode frequencies below this critical field yield a value for the susceptibility anisotropy. Above the critical field the expected negative frequency shift is observed, as well as a positive frequency shift due to bulk material and an unexpected signal close to the Larmor frequency.

Original languageEnglish
Pages (from-to)787-792
Number of pages6
JournalJournal of Low Temperature Physics
Volume101
Issue number3-4
DOIs
Publication statusPublished - 1 Nov 1995
MoE publication typeA1 Journal article-refereed

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