Squid detection of acoustomagnetic effects

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6061089

Pickens, K S

A new type of acoustomagnetic spectrometer is described. This instrument is based on the use of a superconducting quantum interference device (SQUID) to directly detect changes in sample magnetization induced by acoustic waves. The principles embodied in this new technique are explained. The results of experimental work done with the instrument are given. The first observation of SQUID-detected acoustomagnetic effects in solids is reported. In particular, SQUID-NAR (nuclear acoustic resonance) techniques have been used to measure spin lattice relaxation times and to observe the continuous wave NAR in tantalum metal between 1.58 -4.2 K. The acoustic nuclear quadrupole resonance (ANQR) spectra and spin-lattice relaxation times of sup 121 Sb and sup 123 Sb in antimony metal have also been measured by means of the SQUID acoustomagnetic spectrometer. Novel features of the SQUID-detected ANQR spectra are described. In particular, the first measurement of magnetic field dependent nuclear spin relaxation rates in a bulk metal is reported.

• Research Organization: Washington Univ., Seattle (USA)
• OSTI ID: 6061089
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ACOUSTICS
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
MAGNETIC RESONANCE
MAGNETOACOUSTICS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NUCLEAR MAGNETIC RESONANCE
RELAXATION
RESONANCE
SOUND WAVES
SPECTROMETERS
SPIN-LATTICE RELAXATION
SQUID DEVICES
SUPERCONDUCTING DEVICES