APPLICATION OF THE SPIN-PHONON SPECTROMETER TO PULSED VERY HIGH FREQUENCY PHONONS

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Submitted on 1 Jan 1972

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APPLICATION OF THE SPIN-PHONON SPECTROMETER TO PULSED VERY HIGH

FREQUENCY PHONONS

C. Anderson

To cite this version:

C. Anderson. APPLICATION OF THE SPIN-PHONON SPECTROMETER TO PULSED VERY HIGH FREQUENCY PHONONS. Journal de Physique Colloques, 1972, 33 (C4), pp.C4-101-C4-101.

�10.1051/jphyscol:1972421�. �jpa-00215098�

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JOURNAL DE PHYSIQUE Colloque C4, supplgment au no 10, Octobre 1972, page C4-101

APPLICATION OF THE SPIN-PHONON SPECTROMETER TO PULSED VERY HIGH FREQUENCY PHQNONS

C . H. ANDERSON

RCA Laboratories, Princeton, N. J.

Abstract.

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A detailed description of the spin phonon spectrometer recently published covers the response of paramagnetic spens to steady state distributions of phonons in crystals (*). Building on these results the response of spins to repeatative pulses of phonons are discussed here, showing that it is also possible to measure the spectral distributions from pulsed sources as well. Separation of the contributions from the different modes is also possible by either changing the magnetic field orientation or by the more conventional time of flight method.

DISCUSSION

A. F. G. WYATT. - After a short pulse is applied C. H. ANDERSON.

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For phonon frequencies above the recovery takes ^7,so one should have to wait this 10'' Hz the spin response rate is greater than lo3 s-' time ^{( 2 , )}before applying the next pulse. This will which allows a good duty rate to be used.

make the duty rate quite low and ^SOreduce the sensi- _J.D. N.

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Kapitza resistance measure-

tivity. ments on high 8, dielectrics in this temperature range

(1-2 OK) indicate a effective transmission coefficient

(*) Physical Acoustics, Chapter 1, Vol. 8, Academic Press, into the bath unity. results seem be very

1972. consistent with this observation.

Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1972421