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Spin dynamics in a 3D Heisenberg ferromagnet in the paramagnetic state II
| Content Provider | Scilit |
|---|---|
| Author | Labrujere, J. Klaassen, T. O. Poulis, N. J. |
| Copyright Year | 1982 |
| Description | Journal: Journal of Physics C: Solid State Physics In this paper experimental results on electron spin dynamics in a 3D Heisenberg ferromagnet are presented. These experimental results, the spectral densities phi _{0}$^{+}$( omega ), phi _{0}$^{z}$( omega ) and phi _{01}$^{+}$( omega ) of the spin auto- and pair correlation functions, have been measured in $Rb_{2}CuBr_{4}.2H_{2}$O at relatively high temperatures (T=20K, 77K, so that $kT>>JS^{2}$+g mu$ _{B}$B). Comparison of these results with some current theoretical models on spin correlations shows a good high-frequency/short-time agreement. The low-frequency part/diffusion region, shows a remarkable discrepancy, which can be explained by a too high theoretical diffusion constant. The authors' experimental diffusion constant is determined to be $D_{exp}$=0.31+or-0.03 J_{1}$a^{2}$/h(cross). |
| Related Links | http://iopscience.iop.org/article/10.1088/0022-3719/15/5/018/pdf |
| ISSN | 00223719 |
| DOI | 10.1088/0022-3719/15/5/018 |
| Journal | Journal of Physics C: Solid State Physics |
| Issue Number | 5 |
| Volume Number | 15 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1982-02-20 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics C: Solid State Physics Condensed Matter Physics Spin Dynamics Diffusion Constant Experimental Results Heisenberg Ferromagnet 3d Heisenberg |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Condensed Matter Physics Engineering |
