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1995 | 87 | 1 | 107-117
Article title

Diluted Magnetic Semiconductors in High Magnetic Fields

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EN
Abstracts
EN
Magnetization studies of diluted magnetic semiconductors in high fields are reviewed. Magnetization steps due to pairs were originally used to mea­sure the near neighbor exchange constant J_{1}. They are now also used to determine: (1) the smaller exchange constants J_{2} and J_{3}, (2) the differ­ence between J_{1}'s for inequivalent near neighbors in wurtzite diluted mag­netic semiconductors, and (3) the Dzyaloshinski-Moriya interaction. A dif­ferent type of magnetization step, due to isolated ions, is used to deter­mine the uniaxial anisotropy of Co^{++} ions in wurtzite diluted magnetic semiconductors. In Fe-based diluted magnetic semiconductors the high-field magnetization exhibits two effects: (1) strong dependence on field direction in cubic diluted magnetic semiconductors, and (2) reversal of the uniax­ial magnetization-anisotropy in wurtzite diluted magnetic semiconductors. In (100) EuTe/PbTe superlattices the antiferromagnetic transition, both at zero and finite H, is depressed when the EuTe layer becomes only a few monolayers thick. The easy directions are in the (100) plane of the layer, which is explained by the dipole-dipole anisotropy.
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EN
Publisher

Year
Volume
87
Issue
1
Pages
107-117
Physical description
Dates
published
1995-01
Contributors
author
  • Department of Physics, Tufts University, Medford MA 02155, USA
References
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Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv87z111kz
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