منابع مشابه
Tailoring ferromagnetic chalcopyrites.
If magnetic semiconductors are ever to find wide application in real spintronic devices, their magnetic and electronic properties will require tailoring in much the same way that bandgaps are engineered in conventional semiconductors. Unfortunately, no systematic understanding yet exists of how, or even whether, properties such as Curie temperatures and bandgaps are related in magnetic semicond...
متن کاملPressure control of magnetic clusters in strongly inhomogeneous ferromagnetic chalcopyrites
Room-temperature ferromagnetism in Mn-doped chalcopyrites is a desire aspect when applying those materials to spin electronics. However, dominance of high Curie-temperatures due to cluster formation or inhomogeneities limited their consideration. Here we report how an external perturbation such as applied hydrostatic pressure in CdGeP₂:Mn induces a two serial magnetic transitions from ferromagn...
متن کاملTailoring magnetic anisotropy at the ferromagnetic/ferroelectric interface
Tailoring magnetic anisotropy at the ferromagnetic/ferroelectric interface" (2008). Faculty Publications from Nebraska Center for Materials and Nanoscience.
متن کاملEvidence for a neutral grain-boundary barrier in chalcopyrites.
Single grain boundaries in CuGaSe2 have been grown epitaxially. Hall measurements indicate a barrier of 30-40 meV to majority carrier transport. Nevertheless, local surface potential measurements show the absence of space charge around the grain boundary; i.e., it is neutral. Theoretical calculations [Persson and Zunger, Phys. Rev. Lett. 91, 266401 (2003)] have predicted a neutral barrier for t...
متن کاملCriteria for ferromagnetic – insulator – ferromagnetic tunneling
The Rowell criteria, commonly used to identify tunneling in magnetic tunnel junctions (MTJ), are scrutinized. While neither the exponential-thickness dependence of the conductivity nor fits of non-linear transport data are found to be reliable tunneling criteria, the temperature-dependent conductivity does remain a solid criterion. Based on experimental studies of the bias and temperature-depen...
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ژورنال
عنوان ژورنال: Nature Materials
سال: 2004
ISSN: 1476-1122,1476-4660
DOI: 10.1038/nmat1127