2002/04/11 by S. J. Potashnik, K. C. Ku, R. Mahendiran +7 · 140 citations
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Curie temperature #Domain (mathematical analysis) #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetization #Materials science #Mathematical analysis #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spins #ZnO doping and properties #cond-mat
paper · pdf · doi:10.1103/physrevb.66.012408
published in Physical review. B, Condensed matter 66(1) (American Physical Society) · 8 pages, 4 figures, submitted for Rapid Communication in Phys Rev B
arxiv created 2002/04/11 · openalex publication_date 2002/07/03 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine the Mn concentration dependence of the electronic and magnetic properties of optimally annealed Ga_1\ensuremath-xMnxAs epilayers for 1.35%<~x<~8.3%. The Curie temperature (Tc), conductivity, and exchange energy increase with Mn concentration up to x\ensuremath∼0.05, but are almost constant for larger x, with Tc\ensuremath∼110K. The ferromagnetic moment per Mn ion decreases monotonically with increasing x, implying that an increasing fraction of the Mn spins do not participate in the ferromagnetism. By contrast, the derived domain wall thickness, an important parameter for device design, remains surprisingly constant.