The μSR study of the relaxation of Ho and Er magnetic moments in high-Tc 1-2-3 compounds |
| |
| Authors: | V. G. Grebinnik V. N. Duginov V. A. Zhukov S. Kapusta A. B. Lazarev V. G. Olshevsky V. Yu. Pomjakushin S. N. Shilov I. I. Gurevich B. F. Kirillov E. P. Krasnoperov B. A. Nikolsky A. V. Pirogov A. N. Ponomarev V. A. Suetin A. I. Morozov |
| |
| Affiliation: | (1) Joint Institute for Nuclear Research, Dubna, USSR;(2) I. V. Kurchatov Institute of Atomic Energy, Moscow, USSR;(3) Moscow Institute of Radioengineering, Electronics and Automation, Moscow, USSR |
| |
| Abstract: | High temperature superconductors HoBa2Cu3O7−δ (T c ≅93 K), Ho0.5Y0.5Ba2Cu3O7−δ (T c ≅93 K) and ErBa2Cu3O7−δ (T c ≅95 K) were investigated by the zero-field μSR-technique. The muon spin depolarisation rate connected with the fluctuation frequency of rare-earth ion magnetic moments was measured. It was found that the samples with holmium show a fast increase of the muon spin depolarisation rate at temperatures below 20 K, while in ErBa2Cu3O7−δ the depolarisation rate remains low in the whole temperature region studied (4.2 K-270 K). The sharp difference between the behaviours of the muon spin depolarisation rate may be explained by the difference between the ground state of Ho3+ and Er3+ ions in the crystalline field of the lattice. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
