Magnetic excitation spectrum of CoCl2 · 2H2O

Hans C. Fogedby
Phys. Rev. B 10, 4000 – Published 1 November 1974
PDFExport Citation

Abstract

The magnon bound-state spectrum recently observed in the anisotropic magnetic salt CoCl2 · 2H2O is discussed in terms of analytic expressions. The transverse energy spectrum including the coupling to an optic phonon and the longitudinal energy spectrum are evaluated to all orders in jaH0, ja is the transverse anisotropy [ja=(jxjy)2] and H0 is the applied magnetic field, and to second order in the transverse mean exchange jh [jh=(jx+jy)2] and expressed in terms of Bessel functions. In the low-field limit the spectrum is analyzed by means of the quasicalssical method. The transverse and longitudinal intensity spectra have the form of infinite continued fractions and can be expressed in terms of Bessel functions. The low-field and zero-field limits are discussed in detail.

  • Received 20 May 1974

DOI:https://doi.org/10.1103/PhysRevB.10.4000

©1974 American Physical Society

Authors & Affiliations

Hans C. Fogedby*

  • Department of Physics, Harvard University, Cambridge, Massachusetts 02138

  • *Present address: Institut Max von Laue-Paul Langevin, 38042 Grenoble Cedex, France.

References (Subscription Required)

Click to Expand
Issue

Vol. 10, Iss. 9 — 1 November 1974

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×