Single crystal growth and characterization of the intermetallic cubic cage system YCo1.82Mn0.18Zn20

Autor(es)

Cabrera-Baez, M. ^{[1, 2]} ; Finatti, B. F. ^[2] ; Rettori, C. ^{[1, 2]} ; Avila, M. A. ^[2]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: PHYSICA B-CONDENSED MATTER; v. 536, p. 850-854, MAY 1 2018.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 16/15780-0 - Estudo das propriedades físicas de materiais nanoestruturados e interações fundamentais em sistemas bulk
• Beneficiário: Michael Cabrera Baez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 11/19924-2 - Estudo e desenvolvimento de novos materiais avançados: eletrônicos, magnéticos e nanoestruturados: uma abordagem interdisciplinar
• Beneficiário: Carlos Rettori
• Modalidade de apoio: Auxílio à Pesquisa - Temático