Single crystal growth and characterization of MnAs

Author(s)

de Campos, A. ^{[1, 2]} ; Mota, M. A. ^[3] ; Gama, S. ^[4] ; Coelho, A. A. ^[5] ; White, B. D. ^[2] ; da Luz, M. S. ^{[1, 2]} ; Neumeier, J. J. ^[2]

Affiliation

^[1] Univ Fed Triangulo Mineiro, Inst Ciencias Tecnol & Exatas, BR-38025180 Uberaba, MG - Brazil

^[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 - USA

^[3] Univ Fed Maranhao, Dept Fis, Sao Luis, MA - Brazil

^[4] Univ Fed Sao Paulo Unifesp, Dept Ciencias Exatas & Terra, Diadema, SP - Brazil

^[5] Univ Estadual Campinas UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of Crystal Growth; v. 333, n. 1, p. 54-58, OCT 15 2011.
• Web of Science Citations: 5

Abstract

A simple method to grow MnAs single crystals is described, using careful temperature control. Crystal characterization was determined by powder X-ray diffraction, back-reflection Laue diffraction and vibrating sample magnetometry. The results show good magnetic properties with first-order transition sharper than in polycrystalline samples and with the transition occurring at slightly lower temperatures (T(C)=315.5 K) than in the case of polycrystalline samples. The second-order transition in single crystal decreases with applied field at 391 K. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 01/05883-0 - Study of the magnetocaloric effect in intermetallic compounds
• Grantee: Sergio Gama
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 05/04681-6 - Study of colossal magnetocaloric effect in MnAs1-xAx compounds and derived compounds
• Grantee: Ariana de Campos
• Support Opportunities: Scholarships in Brazil - Post-Doctorate