Nucleation at the phase transition near 40~$^{\circ }$C in MnAs nanodisks

B Jenichen; Y Takagaki; K H Ploog; N Darowski; R Feyerherm; I Zizak

doi:10.1063/1.2243867

Nucleation at the phase transition near 40~$^{\circ }$C in MnAs nanodisks

Mesoscale and Nanoscale Physics 2019-07-17 v1 Materials Science

Authors: B Jenichen , Y Takagaki , K H Ploog , N Darowski , R Feyerherm , I Zizak

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Abstract

The phase transition near 40~ $^{\circ }$ C of both as-grown thin epitaxial MnAs films prepared by molecular beam epitaxy on GaAs(001) and nanometer-scale disks fabricated from the same films is studied. The disks are found to exhibit a pronounced hysteresis in the temperature curve of the phase composition. In contrast, supercooling and overheating take place far less in the samples of continuous layers. These phenomena are explained in terms of the necessary formation of nuclei of the other phase in each of the disks independent from each other. The influence of the elastic strains in the disks is reduced considerably.

Keywords

mnas nanodisks phase transition nucleation hysteresis elastic strain molecular beam epitaxy

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@article{arxiv.1907.07027,
  title  = {Nucleation at the phase transition near 40~$^{\circ }$C in MnAs nanodisks},
  author = {B Jenichen and Y Takagaki and K H Ploog and N Darowski and R Feyerherm and I Zizak},
  journal= {arXiv preprint arXiv:1907.07027},
  year   = {2019}
}

Nucleation at the phase transition near 40~$^{\circ }$C in MnAs nanodisks

Abstract

Keywords

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