Ferromagnetism in the hexaborides
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چکیده
منابع مشابه
1 99 9 Excitonic ferromagnetism in the hexaborides
In a recent letter to Nature Young et al . reported ferromagnetism in Ca1−xLaxB6 — a material with no partially filled dor f -orbitals. Three features are noteworthy, the narrow concentration range of doping (0 ∼ x < ∼ 0.01), the small magnetic moment (∼ 0.07μB/La), and the high Curie temperature (TC ∼ 600 K). The parent compound CaB6 is a poor conductor which shows a small overlap EG (< 0) bet...
متن کاملBulk band gaps in divalent hexaborides.
Complementary angle-resolved photoemission and bulk-sensitive k-resolved resonant inelastic x-ray scattering of divalent hexaborides reveal a >1 eV X-point gap between the valence and conduction bands, in contradiction to the band overlap assumed in several models of their novel ferromagnetism. This semiconducting gap implies that carriers detected in transport measurements arise from defects, ...
متن کاملSurface science studies of metal hexaborides.
Over 30 years of surface science research on metal hexaborides are reviewed. Of this class of compounds, lanthanum hexaboride has been the subject of the majority of the studies because of its outstanding properties as a thermionic emitter. The use of LaB6 cathodes as an electron source stems from the unusually low work function of ∼2.5 eV for the (100) surface combined with a low evaporation r...
متن کاملPressure-induced exotic states in rare earth hexaborides.
Finding the exotic phenomena in strongly correlated electron systems (SCESs) and understanding the corresponding microphysics have long been the research frontiers of condensed matter physics. The remarkable examples for the intriguing phenomena discovered in past years include unconventional superconductivity, heavy Fermion behaviors, giant magneto-resistance and so on. A fascinating type of r...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/46207