Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - NMR investigation of the magnetic-susceptibility anisotropy in HE-3-A.
AU - Haley, Richard
AU - Armstrong, Allen
AU - Clancy, Fergus
AU - Manninen, Antti
AU - Hook, John
AU - Hall, Henry
PY - 1995/11
Y1 - 1995/11
N2 - 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.
AB - 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.
U2 - 10.1007/BF00753391
DO - 10.1007/BF00753391
M3 - Journal article
VL - 101
SP - 787
EP - 792
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 3-4
ER -