| Autor: |
Naji Aljawfi, Rezq, Abu-Samak, Mahmoud, Swillam, Mohammed A., Hwa Chae, Keun, Kumar, Shalendra, McLeod, John A. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 7/28/2020, Vol. 128 Issue 4, p1-10, 10p, 1 Chart, 6 Graphs |
| Abstrakt: |
Mn-doped SnO 2 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.%) SnO 2 using magnetization measurements, Mn L 2 , 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%):SnO 2. Simultaneously, we find that Mn 2 + , Mn 3 + , and Mn 4 + also coexist in Mn(6%):SnO 2. These findings demonstrate the care needed to study Mn:SnO 2 and point to the wealth of magnetic behaviors that might be realized with careful control of synthesis conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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