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Type: Artigo de periódico
Title: Ferromagnetic state in ultrathin orthorhombic CrAs films: Thickness, lattice distortion, and half-metallic contributions
Author: Araujo, AA
Laks, B
de Camargo, PC
Abstract: Orthorhombic CrAs thin films were investigated using first-principles spin-polarized calculations in the full-potential linearized augmented plane-wave method. Our results consider two different geometry optimization processes and show that the ferromagnetic state is favored by b-axis expansion, being more stable than the antiferromagnetic state for film thickness below approximately 24 A. The calculated maximum magnetic moment per formula unit is near 3 mu(B) and decreases with increasing film thickness, in good agreement with the observed saturation magnetization. The electronic structure of very thin films with expanded b axis suggests a half-metallic behavior.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 74, n. 17, 2006.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.74.172411
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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