| Form of presentation | Articles in Russian journals and collections |
| Year of publication | 2020 |
| Язык | русский |
|
Eremin Mikhail Vasilevich, author
|
| Bibliographic description in the original language |
Gunter A. Electronic correlations and crystal-field effects in RCu3Ru4 O12 (R=La, Pr, Nd) ELECTRONIC CORRELATIONS and CRYSTAL-FIELD/ A. Gunter,
A. Günther , S. Riegg , W. Kraetschmer, S. Wehrmeister, N. Büttgen, E.-W. Scheidt, H.-A. Krug von Nidda, M. V. Eremin , E. A. Arkhipova , R. M. Eremina, A. Krimmel, H. Mutka ,A. Loidl // PHYSICAL REVIEW B.-2020-.-Vol. 102. -P. 235136-18 |
| Annotation |
PHYSICAL REVIEW B 102, 235136 (2020) |
| Keywords |
RCu3Ru4 O12, R=La, Pr, Nd, Crystal field |
| The name of the journal |
PHYSICAL REVIEW B 102, 235136 (2020)
|
| Please use this ID to quote from or refer to the card |
https://repository.kpfu.ru/eng/?p_id=247690&p_lang=2 |
Full metadata record  |
| Field DC |
Value |
Language |
| dc.contributor.author |
Eremin Mikhail Vasilevich |
ru_RU |
| dc.date.accessioned |
2020-01-01T00:00:00Z |
ru_RU |
| dc.date.available |
2020-01-01T00:00:00Z |
ru_RU |
| dc.date.issued |
2020 |
ru_RU |
| dc.identifier.citation |
Gunter A. Electronic correlations and crystal-field effects in RCu3Ru4 O12 (R=La, Pr, Nd) ELECTRONIC CORRELATIONS and CRYSTAL-FIELD/ A. Gunter,
A. Günther , S. Riegg , W. Kraetschmer, S. Wehrmeister, N. Büttgen, E.-W. Scheidt, H.-A. Krug von Nidda, M. V. Eremin , E. A. Arkhipova , R. M. Eremina, A. Krimmel, H. Mutka ,A. Loidl // PHYSICAL REVIEW B.-2020-.-Vol. 102. -P. 235136-18 |
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/eng/?p_id=247690&p_lang=2 |
ru_RU |
| dc.description.abstract |
PHYSICAL REVIEW B 102, 235136 (2020) |
ru_RU |
| dc.description.abstract |
Among the large class of A-site ordered perovskites of stoichiometry AC3B4O12, the rare-earth (R) ruthenates RCu3Ru4O12 (R = La, Pr, Nd) are interesting compounds due both to Ru-4d-derived electronic correlations and to unconventional crystal-electric-field effects of the R ions. Here we report on detailed investigations of these compounds utilizing x-ray diffraction, neutron scattering, magnetic susceptibility, and electrical resistivity measurements as well as heat capacity and nuclear resonance experiments. A broad range of external parameters is scanned and depending on the specific technique, temperatures range from 100 mK to 730 K in external magnetic fields up to 14 T. In this work LaCu3Ru4O12 serves as reference compound with a nonmagnetic A site, characterized in detail recently [S. Riegg et al., Phys. Rev. B 93, 115149 (2016)]. All compounds investigated reveal heavy-fermion behavior with a T 2 dependence of the low-temperature electrical resistivity
and significantly enhanced Sommerfeld coefficients. Toward low temperatures, the compounds with R = Pr and Nd are dominated by the magnetic moments of the R ions, which occupy crystallographic positions with point-group symmetry Th. The crystal-electric-field effects are clearly visible especially in heat capacity and inelastic neutron scattering data from which the crystal-electric-field parameters are derived. The ground state of the Pr3+ ion is identified as a triplet , whereas for Nd3+ it is a quartet . Evidence for lowering of the Th symmetry is observed at the Pr site at temperatures below 10 K, suggesting the formation of orbital order.
Moreover, the spin-lattice relaxation derived from 63Cu nuclear quadrupole resonance indicates characteristic temperatures close to 7 K and 350 mK, probably related to orbital and magnetic order, respectively. |
ru_RU |
| dc.language.iso |
ru |
ru_RU |
| dc.subject |
RCu3Ru4 O12 |
ru_RU |
| dc.subject |
R=La |
ru_RU |
| dc.subject |
Pr |
ru_RU |
| dc.subject |
Nd |
ru_RU |
| dc.subject |
Crystal field |
ru_RU |
| dc.title |
Electronic correlations and crystal-field effects in RCu3Ru4 O12 (R=La, Pr, Nd) ELECTRONIC CORRELATIONS and CRYSTAL-FIELD |
ru_RU |
| dc.type |
Articles in Russian journals and collections |
ru_RU |
|
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