2013/04/04 by Youming Zou, Zhe Qu, Zou, Youming +11
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1304.1387
15 pages, 6 figures, to be published in Journal of Alloys and Compounds
arxiv created 2013/04/04 · openalex publication_date 2013/04/04 · arxiv updated 2013/04/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the effects of Al-doping on the structure and magnetic properties in CaBa(Co1-xAlx)4O7 (0≤x≤0.25). The system exhibits a structural transition from an orthorhombic symmetry to a hexagonal symmetry when the Al content exceeds x = 0.1. The Curie temperature and the value of the magnetization decrease with increasing Al doping level, indicating that the ferrimagnetic ground state is gradually suppressed. The ground state eventually transits into a spin-glass state for x > 0.1. Moreover, the short-range magnetic correlations, which occur at high temperatures in CaBaCo4O7, are found to be gradually suppressed with increasing Al content and eventually disappear for x = 0.25. By comparing our results with other Co-site doping cases, we suggest that the lattice and the spin degrees of freedom are relatively decoupled in CaBaCo4O7.