Electronic Structure and Spontaneous Magnetization in Mn-doped SnO2

Title
Electronic Structure and Spontaneous Magnetization in Mn-doped SnO2
Authors
채근화Rezq Naji AljawfiMahmoud Abu-SamakMohammed A. SwillamShalendra KumarJohn A. McLeod
Keywords
Electronic structure; magnetization; Mn-doped SnO2; dilute magnetic semiconductor; density functional theory
Issue Date
2020-07
Publisher
Journal of applied physics
Citation
VOL 128-045705
Abstract
Mn-doped SnO2 is a promising dilute magnetic semiconductor; however, there are many inconsistent reports on the magnetic ordering in the literature. We investigate the magnetic ordering and the local electronic structure in stoichiometric and Mn-doped (with Mn concentrations of 1 at.%, 3 at.%, and 6 at.%) SnO2 using magnetization measurements, Mn L2,3-edge and O K-edge x-ray absorption fine structure measurements, and density functional theory and model Hamiltonian calculations. We find that paramagnetic and ferromagnetic behavior is present as a function of Mn concentration and, in particular, that paramagnetic, ferromagnetic, and antiferromagnetic order coexist independently in Mn(6%):SnO2. Simultaneously, we find that Mn2þ, Mn3þ, and Mn4þ also coexist in Mn(6%):SnO2. These findings demonstrate the care needed to study Mn:SnO2 and point to the wealth of magnetic behaviors that might be realized with careful control of synthesis conditions.
URI
http://pubs.kist.re.kr/handle/201004/72232
ISSN
0021-8979
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KIST Publication > Article
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