Abstract
The spin dynamics of a number of mixed valent materials have now been extensively studied using varied experimental probes including EPR, Raman scattering, infrared spectroscopy and inelastic neutron scattering. In this paper we review briefly photon and neutron spectroscopic studies of the 7F0–7F1 excitation dynamics in semiconducting SmS, SmSe and SmTe. New results for the phonon dispersion relations in SmS are presented. We also discuss recent neutron scattering experiments by Axe, Lawrence, Parks and ourselves on the γ-α transition in Ce.74Th.26. It is found that the spin fluctuation energy evolves from ~20 to >70 meV in going from the γ to the α phase.
Work at Brookhaven performed under the auspices of the U.S. Energy Research and Development Agency
Work at M.I.T. supported by the National Science Foundation
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
W. Marshall and S. W. Lovesey, Theory of Thermal Neutron Scattering (Oxford U. P., New York, 1971).
E. Bucher, V. Narayanamurti and A. Jayaraman, J. Appl. Phys. 42, 1741 (1971) and references therein.
J. M. Lawrence, M. C. Croft and R. D. Parks, Phys. Rev. Lett. 35, 289 (1975);
R. D. Parks and J M. Lawrence, A. I. P. Conf. Proc. 29, 479 (1976) and to be published.
R. J. Birgeneau, A. I. P. Conf. Proc. 10, 1664 (1973).
S. M. Shapiro, R. J. Birgeneau and E. Bucher, Phys. Rev. Lett. 34, 470 (1975).
M. I. Nathan, F. Hotzberg, J. E. Smith Jr., J. B. Torrance and J. C. Tsang, Phys. Rev. Lett. 34, 467 (1975)
M. I. Nathan, F. Hotzberg, J. E. Smith Jr., J. B. Torrance and J. C. Tsang, Phys. Rev. Lett.E34, 1136 (1975).
R. J. Birgeneau, E. Bucher, L. W. Rupp Jr. and W. M. Walsh Jr., Phys. Rev. B 5, 3412 (1972);
F. Mehran, K. W. H. Stevens, R. S. Title and F. Holtzberg, Phys. Rev. Lett. 27, 1368 (1971).
J. Donohue, The Structure of Elements (John Wiley, New York, 1975, pp 88–94).
S. M. Shapiro, J. D. Axe, R. J. Birgeneau, J. M. Lawrence and R. D. Parks (to be published).
K. R. Lea, M. J. M. Leask and W. P. Wolf, J. Phys. Chem. Solids 23, 1381 (1962).
B. D. Rainford, B. Buras and B. Lebech (to be published).
C. M. Varma, Rev. Mod. Phys. 48, 219 (1976) and the multitudinous theoretical papers in these proceedings.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1977 Plenum Press, New York
About this chapter
Cite this chapter
Birgeneau, R.J., Shapiro, S.M. (1977). Magnetic Excitations in Mixed Valent Materials. In: Parks, R.D. (eds) Valence Instabilities and Related Narrow-Band Phenomena. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8816-0_5
Download citation
DOI: https://doi.org/10.1007/978-1-4615-8816-0_5
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-8818-4
Online ISBN: 978-1-4615-8816-0
eBook Packages: Springer Book Archive