نتایج جستجو برای: magnetism
تعداد نتایج: 8217 فیلتر نتایج به سال:
We measured the temperature-dependent three-dimensional angle-resolved photoemission spectra of EuO (100) thin film, a typical Heisenberg ferromagnetic semiconductor, to investigate the essential origin of the ferromagnetic transition. We observed sizable energy dispersion and large binding-energy shift of the Eu 4f state below the Curie temperature only near the Gamma and X points, despite the...
The ground state properties of CeCoPO, a homologue of the new high temperature superconductors LnFePnO1−xFx, were studied by means of susceptibility, specific heat, and resistivity measurements on polycrystals. The observation of a well defined Curie-Weiss behavior above 230K with μeff = 2.9μB and a ferromagnetic ordering below TC = 75K is similar to what was observed in LaCoPO and points to ma...
Phase boundaries in multiferroics, in which (anti-)ferromagnetic, ferroelectric and ferroelastic order parameters coexist, enable manipulation of magnetism and electronic properties by external electric fields through switching of the polarization in the material. It has been shown that the strain-driven morphotropic phase boundaries in a single-phase multiferroic such as BiFeO3 (BFO) can exhib...
In 1971, not only the theoretical and by definition already existing 'ideal memristor' concept was introduced, but a real memristor device was suggested on grounds of the already known real inductors. The latter is a scientifically significant hypothesis grounded in fundamental symmetries of basic physics, here electro-magnetism. 2008 claimed the discovery of the "missing memristor." Controvers...
A wealth of intriguing properties emerge in the seemingly simple system composed of the band insulators LaAlO(3) and SrTiO(3) such as a two-dimensional electron gas, superconductivity and magnetism. In this paper, we review the current insight obtained from first principles calculations on the mechanisms governing the behaviour of thin LaAlO(3) films on SrTiO(3)(001). In particular, we explore ...
The complex correlation of structure and magnetism in highly coercive monoatomic FePt surface alloys is studied using scanning tunneling microscopy, x-ray magnetic circular dichroism, and ab initio theory. Depending on the specific lateral atomic coordination of Fe either hard magnetic properties comparable to that of bulk FePt or complex noncollinear magnetism due to Dzyaloshinski-Moriya inter...
Eor six years, Eriedrich Schlegel kept a diary of the magnetism therapy of his friend the Countess Eranziska Lesniowska. The Countess's illness was marked by repetitive symptoms often related to memories of past events; she experienced phenomena similar to what Ereud later called the uncanny retum of repressed content. However, Schlegel believed she was clairvoyant and that her symptoms were in...
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