40 citations · 101 across the 10 of their papers we have counts for
10 papers
Spin Splitting Tunable Optical Bandgap in GdN Thin Films for Spin Filtering
G. L. S. Vilela, G. M. Stephen, X. Gratens +7
Rare-earth nitrides, such as gadolinium nitride (GdN), have great potential for spintronic devices due to their unique magnetic and electronic properties. GdN has a large magnetic…
Magnetization of Zn1-xCoxO nanoparticles: single-ion anisotropy and spin clustering
X. Gratens, B. de Abreu Silva, M. I. B. Bernardi +3
The magnetization of Zn1-xCoxO (0.0055 < x < 0.073) nanoparticles has been measured as a function of temperature T (1.7 K < T , 10 K) and for magnetic field up to 65 kOe using a SQ…
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…