5 papers · 1 filter
Magnetic anisotropy switching in (Ga,Mn)As with increasing hole concentration
K. Hamaya, T. Watanabe, T. Taniyama +3
We study a possible mechanism of the switching of the magnetic easy axis as a function of hole concentration in (Ga,Mn)As epilayers. In-plane uniaxial magnetic anisotropy along [11…
Dynamic relaxation of magnetic clusters in a ferromagnetic (Ga,Mn)As epilayer
K. Hamaya, T. Koike, T. Taniyama +3
A new scenario of the mechanism of intriguing ferromagnetic properties in Mn-doped magnetic semiconductor (Ga,Mn)As is examined in detail. We find that magnetic features seen in ze…
Ion Irradiation Control of Ferromagnetism in (Ga,Mn)As
H. Kato, K. Hamaya, T. Taniyama +2
We report on a promising approach to the artificial modification of ferromagnetic properties in (Ga,Mn)As using a Ga focused ion beam (FIB) technique. The ferromagnetic propert…
Effect of Ga irradiation on magnetic and magnetotransport properties in (Ga,Mn)As epilayers
H. Kato, K. Hamaya, Y. Kitamoto +2
We report on the magnetic and magnetotransport properties of ferromagnetic semiconductor (Ga,Mn)As modified by Ga ion irradiation using focused ion beam. A marked reduction i…
Mixed magnetic phases in (Ga,Mn)As epilayers
K. Hamaya, T. Taniyama, Y. Kitamoto +1
Two different ferromagnetic-paramagnetic transitions are detected in (Ga,Mn)As/GaAs(001) epilayers from ac susceptibility measurements: transition at a higher temperature results f…