| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Fed ABC, CCNH, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | JOURNAL OF ELECTRONIC MATERIALS; v. 43, n. 6, p. 1988-1992, JUN 2014. |
| Web of Science Citations: | 5 |
| Abstract | |
FeGa3 and related compounds have been subjects of recent investigation for their interesting thermoelectric, electronic, and magnetic behaviors. Here, single crystals of FeGa3-y Ge (y) were grown by the self-flux technique with effective y = 0, 0.09(1), 0.11(1), and 0.17(1) in order to investigate the evolution of the diamagnetic semiconducting compound FeGa3 into a ferromagnetic metal, which occurs through the electron doping and band structure modifications that result from substitution of Ge for Ga. Heat capacity and magnetization measurements reveal non-Fermi liquid behavior in the vicinity of the transition from a paramagnetic to ferromagnetic ground state, suggesting the presence of a ferromagnetic quantum critical point (FMQCP). We also present the first results of hole doping in this system by the growth of FeGa3-y Zn (y) single crystals, and electron- and hole doping of the related compound CoGa3 by CoGa3-y Ge (y) and CoGa3-y Zn (y) crystal growths, aiming to search for further routes to band structure and charge carrier tuning, thermoelectric optimization, and quantum criticality in this family of compounds. The ability to tune the charge carrier type warrants further investigation of the MGa3 system's thermoelectric properties above room temperature. (AU) | |
| FAPESP's process: | 11/23795-3 - Looking for new and better thermoelectrics |
| Grantee: | Raquel de Almeida Ribeiro |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 12/17562-9 - Preparation of oriented single crystals for studies on electronic, magnetic and thermal anisotropies |
| Grantee: | Marcos de Abreu Avila |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 11/19924-2 - Study and development of advanced novel materials: electronic, magnetic and nanostructured: an interdisciplinary approach |
| Grantee: | Carlos Rettori |
| Support Opportunities: | Research Projects - Thematic Grants |