2007
DOI: 10.1016/j.physb.2006.06.159
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Magnetic properties of MnAs thin films grown on GaAs (001) by MOVPE

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Cited by 3 publications
(4 citation statements)
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“…On the contrary the MnAs/SiO 2 /Si films are polycrystalline with random oriented a-MnAs grains. In all the samples the paramagnetic b-phase was not detected at 300 K, in agreement with other works on MOVPE-grown MnAs/(0 0 1)GaAs films [11] but in contrast with the results of Kaganer et al [9] on MBE-grown MnAs/ (0 0 1)GaAs films. However, we cannot exclude the possible occurrence of phase coexistence in the temperature region above 300 K where we have found the transition to occur (see below).…”
Section: Resultssupporting
confidence: 92%
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“…On the contrary the MnAs/SiO 2 /Si films are polycrystalline with random oriented a-MnAs grains. In all the samples the paramagnetic b-phase was not detected at 300 K, in agreement with other works on MOVPE-grown MnAs/(0 0 1)GaAs films [11] but in contrast with the results of Kaganer et al [9] on MBE-grown MnAs/ (0 0 1)GaAs films. However, we cannot exclude the possible occurrence of phase coexistence in the temperature region above 300 K where we have found the transition to occur (see below).…”
Section: Resultssupporting
confidence: 92%
“…The in-plane anisotropy has been found also in the thinner sample (18 nm), but the anisotropy field turns out to be reduced (H A E3.6 kOe, K u E0.8 Â 10 6 erg/cm 3 ), as expected due to the increasing prevalence of surface anisotropy effects on reducing film thickness [18]. On the contrary, the thinner sample is characterized by a larger easy-axis coercivity (of about 740 Oe), very close to that observed in other MOVPE-grown MnAs/ (0 0 1)GaAs film of similar thickness [11].…”
Section: Resultssupporting
confidence: 79%
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“…The effective anisotropy constant of MnAs has been reported in the literature for bulk, thin films, and nanocrystals. At room temperature, bulk MnAs is characterized by a value 24 K eff =76x10 4 erg/cm 3 , while thin films grown on GaAs substrates exhibit anisotropy values 25,26,27,28 ranging from 12x10 4 to 72x10 4 erg/cm 3 . It was also found that for MnAs nanocrystals somewhat smaller than those of this study, the anisotropy values 29 were in the range 14x10 4 to 18x10 4 erg/cm 3 .…”
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confidence: 99%