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Ground state and low-energy magnetic dynamics in the frustrated magnet CoAl2O4 as revealed by local spin probesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Iakovleva M., Vavilova E., Grafe H.J., Zimmermann S., Alfonsov A., Luetkens H., Klauss H.H., Maljuk A., Wurmehl S., Büchner B., Kataev V.
- Журнал: Physical Review B
- Том: 91
- Номер: 14
- Год издания: 2015
- Издательство: American Physical Society
- Местоположение издательства: United States
- Номер статьи: 144419
- DOI: 10.1103/physrevb.91.144419
- Аннотация: We report a combined experimental study of magnetic properties of a single crystal of the frustrated diamond lattice antiferromagnet CoAl 2 O 4 with Co 2+ electron spin resonance, Al 27 nuclear magnetic resonance, and muon spin rotation/relaxation techniques. With our local probes, we show that the frustration of spin interactions and the Co/Al site disorder strongly affect the spin dynamics. The experimental results evidence inhomogeneous and slow magnetic fluctuations and the occurrence of short-range electron spin correlations far above a characteristic temperature T*= 8 K at which the spin system turns into in a quasistatic state. Our data indicate that this spin order is likely short range and unconventional with spin fluctuations persistent even at T≪ T*. The results of three spectroscopy techniques highlight a nontrivial role of structural disorder for the magnetism of a frustrated diamond spin lattice at the proximity to the critical point.
- Добавил в систему: Вавилова Евгения Леонидовна