Magnetic Impurity Effects on Ferromagnetic Fluctuations in Heavily Overdoped (Bi,Pb)2Sr2Cu1−yFeyO6+δ Cuprates
| Autor: | Hideki Kuwahara, Shusei Onishi, Yota Komiyama, Haruhiko Kuroe, Mayuko Harada, Tadashi Adachi, Yoji Koike, Takayuki Kawamata, a. Koshi Kurashima, Isao Watanabe |
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| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons Magnetization Materials science Condensed matter physics Ferromagnetism Condensed Matter - Superconductivity Condensed Matter::Superconductivity General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons Cuprate Magnetic impurity |
| Zdroj: | Journal of the Physical Society of Japan. 90:084701 |
| ISSN: | 1347-4073 0031-9015 |
| Popis: | We investigated Fe-substitution effects on ferromagnetic fluctuations in the superconducting overdoped and non-superconducting heavily overdoped regimes of the Bi-2201 cuprates by the magnetization and electrical-resistivity measurements. It was found that the spin-glass state was induced at low temperatures by the Fe substitution. The Curie constant and the effective Bohr magneton, estimated from the magnetic susceptibility, as well as the dimensionality of the ferromagnetic fluctuations from the resistivity, suggest the enhancement of the ferromagnetic fluctuations owing to the Fe substitution. A ferromagnetic spin-cluster model is proposed in the heavily overdoped regime of Bi-2201, while an antiferromagnetic spin-cluster model has been proposed in the overdoped regime of Bi-2201 [Hiraka et al., Phys. Rev. B 81, 144501 (2010)]. Comment: 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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