12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > NMR investigation of the magnetic-susceptibilit...
View graph of relations

« Back

NMR investigation of the magnetic-susceptibility anisotropy in HE-3-A.

Research output: Contribution to journalJournal article

Published

  • Richard Haley
  • Allen Armstrong
  • Fergus Clancy
  • Antti Manninen
  • John Hook
  • Henry Hall
Journal publication date11/1995
JournalJournal of Low Temperature Physics
Journal number3-4
Volume101
Number of pages6
Pages787-792
Original languageEnglish

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 mu m 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.