Abstract
Neutron scattering experiments with full polarization analysis have been performed with a single crystal of chromium to study the low-energy spin fluctuations in the transverse spin density wave (TSDW) state. A number of remarkable results have been found. Inelastic scattering observed close to the TSDW satellite positions at (1±δ,0,0) does not behave as expected for magnon scattering. In particular, the scattering corresponds to almost equally strong magnetization fluctuations both parallel and perpendicular to the ordered moments of the TSDW phase. As the Neel temperature is approached from below, scattering at the commensurate wave vector (1,0,0) increases in intensity as a result of critical scattering at “silent” satellites (1,0,±δ) being included within the spectrometer resolution function. This effect, first observed by Sternlieb et al, does not account for all of the inelastic scattering around the (1,0,0) position, however. Rather, there are further collective excitations, apparently emanating from the TSDW satellites, which correspond to magnetic fluctuations parallel to the ordered TSDW moments. These branches have a group velocity that is close to that of (1,0,0) longitudinal acoustic (LA) phonons, but assigning their origin to magneto-elastic scattering raises other unanswered questions.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
For a comprehensive review see: E. Fawcett, (1988) Rev. Mod. Phys., 60, 209
W. M. Lomer, (1962) Proc. Phys. Soc. London 80, 489
P. A. Fedders and P. C. Martin, (1966) Phys. Rev. 142, 24
for a comprehensive list of references to microscopic models see K. Machida and M. Fulita, (1984) Phys. Rev. B30, 5284
R. Pynn, W. Press, S. M. Shapiro and S. A. Werner, (1976) Phys. Rev.B13 295
S. A. Werner, A. Arrott, and M. Atoji, J. Appl. (1969) Phys. 40, 1447
R.M. Moon, T. Riste, and W. C. Koehler, (1969) Phys. Rev. 181, 920
R. Pynn, J-P. Boucher and L-P Regnault, (1989) Physica B160, 204
R. Fincher, Jr., G. Shirane, and S. A. Werner, (1981) Phys. Rev. B24, 1312
S. K. Burke, W. G. Stirling, K. R. A Ziebeck, and J. C. Booth, (1983) Phys. Rev. Lett. 51, 494
B. H. Grier, G. Shirane, and S. A. Werner, (1985) Phys. Rev. B31, 2882
B. J. Sternlieb, J. P. Hill, T. Inami, and G. Shirane, (1995) Phys. Rev. Lett. 75, 541
H. Sato and K. Maki, (1974) Int. J. Man. 6, 1983
J. B. Sokoloff, (1969) Phys. Rev. 185, 770);
J. B. Sokoloff, (1969) Phys. Rev. 185, 783;
J. B. Sokoloff, (1969) Phys. Rev. 187, 584
X. Zhu and M. B. Walker, (1986) Phys. Rev. B34, 8064)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Pynn, R., Azuah, R.T., Stirling, W.G., Kulda, J. (1998). Low Energy Spin Excitations in Chromium Metal. In: Skjeltorp, A.T., Sherrington, D. (eds) Dynamical Properties of Unconventional Magnetic Systems. NATO ASI Series, vol 349. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4988-4_12
Download citation
DOI: https://doi.org/10.1007/978-94-011-4988-4_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6093-6
Online ISBN: 978-94-011-4988-4
eBook Packages: Springer Book Archive