40 citations · 101 across the 10 of their papers we have counts for
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Modeling huge photoinduced spin polarons in intrinsic magnetic semiconductors
S. C. P. van Kooten, X. Gratens, A. B. Henriques
In intrinsic magnetic semiconductors, the absorption of a single photon can generate a spin polaron, whose magnetic moment reaches many thousands of Bohr magnetons [1.2]. Here we i…
Magnetization steps of quintets in the hcp lattice
X. Gratens, V. Chitta
The magnetization steps of quintet clusters, consisting of five identical magnetic ions coupled by isotropic nearest neighbors antiferromagnetic exchange interaction in the hcp lat…
Effects of Reducing Heat Treatment on the Structural and the Magnetic Properties of Mn:ZnO Ceramics
V. M. Almeida Lage, R. T. da Silva, A. Mesquita +4
Polycrystalline bulk Mn:ZnO ceramics with Mn nominal concentrations of 6, 11, 17 and 22 at.% were prepared trough solid-state reaction method and subjected to a heat treatment in r…
Defect Induced Room Temperature Ferromagnetism in High Quality Co-doped ZnO Bulk Samples
M. P. F. de Godoy, X. Gratens, V. A. Chitta +6
The nature of the often reported room temperature ferromagnetism in transition metal doped oxides is still a matter of huge debate. Herein we report on room temperature ferromagnet…
Hypergiant spin polarons photogenerated in ferromagnetic europium chalcogenides
X. Gratens, Yunbo Ou, J. Moodera +2
We find that in the ferromagnetic semiconductor EuS, near its Curie temperature, a single band-edge photon generates a spin polaron (SP), whose magnetic moment approaches 20,000 Bo…