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Spin Dynamics of Strongly Doped La1-xsrxmno3
| Content Provider | Semantic Scholar |
|---|---|
| Author | Vasiliu-Doloc, Lida Lynn, Jeffrey W. Mukovskiĭ, Ya. M. Arsenov, A. A. Shulyatev, Dmitry A. |
| Copyright Year | 1998 |
| Abstract | Cold neutron triple-axis measurements have been used to investigate the nature of the long-wavelength spin dynamics in strongly doped La1−xSrxMnO3 single crystals with x=0.2 and 0.3. Both systems behave like isotropic ferromagnets at low T, with a gapless (E0<0.02 meV) quadratic dispersion relation E=E0+Dq2. The values of the spin-wave stiffness constant D are large (DT=0=167 meV A2 for x=0.2 and DT=0=176 meV A2 for x=0.3), which directly shows that the electron transfer energy for the d band is large. D exhibits a power law behavior as a function of temperature, and appears to collapse as T→TC. Nevertheless, an anomalously strong quasielastic central component develops and dominates the fluctuation spectrum as T→TC. Bragg scattering indicates that the magnetization near TC exhibits power law behavior, with β≃0.30 for both systems, as expected for a three-dimensional ferromagnet. |
| Starting Page | 7342 |
| Ending Page | 7344 |
| Page Count | 3 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.367634 |
| Volume Number | 83 |
| Alternate Webpage(s) | https://arxiv.org/pdf/cond-mat/9712191v1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.367634 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
