| 1. |
- Fraerman, A. A., et al.
(författare)
-
Magnetic force microscopy to determine vorticity direction in elliptical Co nanoparticles
- 2004
-
Ingår i: Physics of low-Dimensional structures. - 0204-3467. ; 1-2, s. 35-40
-
Tidskriftsartikel (refereegranskat)abstract
- We present a magnetic force microscopy investigation into the magnetic properties of arrays of Co nanoparticles fabricated by electron be am lithography. Vorticity directions are determined in zero applied magnetic fields. Experimental dependence of height on stable magnetic states of the particles is investigated. The statistics of the vorticity direction distribution is discussed.
|
|
| 2. |
- Chastellain, M., et al.
(författare)
-
Superparamagnetic silica-iron oxide nanocomposites for application in hyperthermia
- 2004
-
Ingår i: Advanced Engineering Materials. - : Wiley. - 1438-1656 .- 1527-2648. ; 6:4, s. 235-241
-
Tidskriftsartikel (refereegranskat)abstract
- Superparamagnetic iron oxide particles embedded in silica are studied for application in hyperthermia. The temperature increase is studied when submitting the samples to a weak alternating magnetic field. The influence of the iron oxide size distribution, saturation magnetization, out of phase susceptibility and anisotropy constant is discussed. A theoretical calculation of power loss is carried out and agrees with experimental data.
|
|
| 3. |
- Sharma, P, et al.
(författare)
-
Room temperature spintronic material - Mn-doped ZnO revisited
- 2004
-
Ingår i: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 282, s. 115-121
-
Tidskriftsartikel (refereegranskat)abstract
- We report the first observations of ferromagnetism above room temperature for small atomic percentages of Mn doped in ZnO. In a homogeneous bulk pellet sample sintered at low temperatures (similar to 500degrees C Mn is found to carry an average moment of 0.16 mu(B) per Mn ion. We have obtained room temperature ferromagnetic ordering in samples containing around 2% Mn in the form of powder, bulk pellets and 2-3 mum, thick transparent laser-ablated films. The new capability to fabricate ferromagnetic Mn-doped ZnO semiconductors promises new devices related to spintronic devices as well as magneto-optic components.
|
|
