dc.contributor.author |
Shengelaya A. |
|
dc.contributor.author |
Keller H. |
|
dc.contributor.author |
Müller K. |
|
dc.contributor.author |
Kochelaev B. |
|
dc.contributor.author |
Conder K. |
|
dc.date.accessioned |
2018-09-17T21:35:10Z |
|
dc.date.available |
2018-09-17T21:35:10Z |
|
dc.date.issued |
2000 |
|
dc.identifier.issn |
1557-1939 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/135177 |
|
dc.description.abstract |
The electron paramegnetic resonance (EPR) of Mn2+ doped into La2-xSrxCuO4 was used to probe the copper spin relaxation via the bottleneck effect for oxygen isotope (16O and 18O)-substituted samples. It was found that the EPR linewidth is larger for the 18O isotope samples than for the 16O samples. For x = 0.03, the linewidth for the 18O sample is larger than for 16O sample by a factor of 2. The isotope effect is pronounced at low temperatures and decreases with increasing Sr concentration. This effect is quantitatively explained by the Cu2+ S = 1/2 spin relaxation to the lattice via Dzyaloshinski terms coupled linearly to the local Q4/Q5 tilting modes of the CuO6 octahedra as proposed by Kochelaev et al. [1] The Q4/Q5 modes are coupled sterically to the Q2 Jahn-Teller modes considered to be relevant for the (bi)-polaron formation and thus for the high-temperature superconductivity (HTSC). © 2000 Plenum Publishing Corporation. |
|
dc.relation.ispartofseries |
Journal of Superconductivity and Novel Magnetism |
|
dc.subject |
EPR |
|
dc.subject |
Isotope effect |
|
dc.subject |
LSCD |
|
dc.title |
Tilting mode relaxation and oxygen isotope effect in La 2-xSrxCuO4 studied by electron paramagnetic resonance |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
6 |
|
dc.relation.ispartofseries-volume |
13 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
955 |
|
dc.source.id |
SCOPUS15571939-2000-13-6-SID0034498029 |
|