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Nuclear Spin Relaxation of 8 Li in a Thin Film of La 0:67 Ca 0:33 MnO 3
| Content Provider | Semantic Scholar |
|---|---|
| Author | Arseneau, Donald J. Daviel, S. Engelbertz, A. Keeler, Todd Kreitzman, S. R. Moralès, Patrick Saadaoui, Hassan Salman, Zaher Wang, Dongfang |
| Copyright Year | 2005 |
| Abstract | We report -NMR measurements of the nuclear spin relaxation rate (1=T1) in a thin lm of La0:67Ca0:33MnO3 (LCMO) using a low energy beam of spin polarized 8 Li. In a small magnetic eld of 150 G there is broad peak in 1=T1 near the Curie temperature (Tc = 259 K) and a dramatic decrease in 1=T1 at lower temperatures. This is attributed to a critical slowing down of the spin uctuations nearTc and freezing of the magnetic excitations at low temperatures, respectively. In addition there is a small amplitude, slow relaxing component at high temperatures which we attribute to 8 Li in the STO substrate. There is indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic lm. These results establish that low energy -NMR can be used as a probe of magnetic uctuations in magnetic thin lms over a wide range of temperatures. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.physics.utoronto.ca/~wei/Miller_muSR_LCMO_preprint_2005.pdf |
| Alternate Webpage(s) | http://bnmr.triumf.ca/PDFs/musr05-LCMO-RIMiller-resub.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
