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[en] A central theme of the discussion about education in Europe is linked to improving the quality and relevance of skills and competences that educational system beneficiaries form during their training. To perform a proper and coherent analysis on the introduction of informations about ferrofluids in the national curriculum a sociological study was conducted in several schools in the city Bârlad, Romania. Through an interactive exhibition stand, pupils were able to maneuver a ferrofluid with a magnet. The stand was arranged such as to allow easy access for handling the ferrofluid and for reading the informations displayed on its walls. (paper)

[en] The successful investigations of r.f. effects in NGR were recently in progress. The purpose of this paper is to pay attention to some new theoretical results in this field which may be an object of the experimental realization. (orig.)

[en] Short communication

[en] It is shown that a helicoidal magnetic ordering leads to a strong anisotropy of the gap in the electron excitation spectrum, and results in an abrupt suppression of the superconductivity when the helicoidal wavelength is longer than a characteristic length, which is much shorter than the coherence length xi₀

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[en] We present the results of x-ray scattering studies of the charge and orbital ordering in the manganite series Pr_1-z, Ca_x, MnO₃ with x = 0.25, 0.4 and 0.5. The polarization and azimuthal dependence of the charge and orbital ordering in these compounds is characterized both in the resonant and nonresonant limits, and compared with the predictions of current theories. The results are qualitatively consistent with both cluster and LDA+U calculations of the electronic structure