| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Fed ABC UFABC, CCNH, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | PHYSICA B-CONDENSED MATTER; v. 536, p. 850-854, MAY 1 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
We report on the growth of YCo2-xMnxZn20 cubic single crystals (0 <= x <= 0.18) and their characterization through elemental analysis, x-ray diffraction, magnetization and heat capacity. Mn intermediate and/or mixed-valence-like behavior was observed in the magnetic response of YCo1.82Mn0.18Zn20 (and all other samples) at temperatures between 100 K and 200 K, and a spin-glass state is established at low temperatures. Specific heat results for x = 0.18 show an increased Sommerfeld coefficient of gamma approximate to 100 mJ/mol. K-2 compared to that of the undoped compound (18 mJ/mol. K-2) suggesting an enhancement of the quasiparticle effective mass ignoring spin- glass effects at very low temperatures. The combination of different experimental data provides a better understanding of the Mn2+ effects in the weakly correlated electron compound of YCo2Zn20, the first case in this family of compounds where local magnetic moments come exclusively from the transition metal. (AU) | |
| FAPESP's process: | 16/15780-0 - Study of the physical properties of nanostructured materials and fundamental interactions in bulk systems |
| Grantee: | Michael Cabrera Baez |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| 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 |