dc.contributor.author |
Deisenhofer J. |
|
dc.contributor.author |
Schaile S. |
|
dc.contributor.author |
Teyssier J. |
|
dc.contributor.author |
Wang Z. |
|
dc.contributor.author |
Hemmida M. |
|
dc.contributor.author |
Von Nidda H. |
|
dc.contributor.author |
Eremina R. |
|
dc.contributor.author |
Eremin M. |
|
dc.contributor.author |
Viennois R. |
|
dc.contributor.author |
Giannini E. |
|
dc.contributor.author |
Van Der Marel D. |
|
dc.contributor.author |
Loidl A. |
|
dc.date.accessioned |
2018-09-18T20:21:03Z |
|
dc.date.available |
2018-09-18T20:21:03Z |
|
dc.date.issued |
2012 |
|
dc.identifier.issn |
1098-0121 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/138978 |
|
dc.description.abstract |
We report on susceptibility and electron spin resonance (ESR) measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic symmetry. In this dimer system, the V4+ ions are in tetrahedral environment and are coupled by an antiferromagnetic intradimer exchange constant J/kB≈ 100 K to form a singlet ground state without any phase transitions between room temperature and 2 K. Based on an extended Hückel tight-binding analysis, we identify the strongest exchange interaction to occur between two inequivalent vanadium sites via two intermediate oxygen ions. The ESR absorption spectra can be well fitted by a single Lorentzian line and the temperature dependence of the ESR intensity, and the dc susceptibility can be modeled by using the Bleaney-Bowers approach for independent dimers. The temperature dependence of the ESR linewidth at X-band frequency can be modeled by a superposition of a linear increase with temperature with a slope α =1.35 Oe/K and a thermally activated behavior with an activation energy Δ/kB =1418 K, both of which point to spin-phonon coupling as the dominant relaxation mechanism in this compound. © 2012 American Physical Society. |
|
dc.relation.ispartofseries |
Physical Review B - Condensed Matter and Materials Physics |
|
dc.title |
Electron spin resonance and exchange paths in the orthorhombic dimer system Sr2VO4 |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
21 |
|
dc.relation.ispartofseries-volume |
86 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.source.id |
SCOPUS10980121-2012-86-21-SID84871531524 |
|