Fyzikální ústav Akademie věd ČR

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Participants Forum and Fellows Meeting

HiPER News, 3.6.2010.

Members of the HiPER community gathered...

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Czech Institute of Physics boosts efficiency

IBM Cases studies, 5.3.2010.

IBM iDataPlex has a really...

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What Makes It So Hard?

Physical Review Focus, 4/9/ 2009.

A recently developed material...

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Selected results of department 24

Electron magnetic circular dichroism – new method in spectroscopy of nanomagnetics

Fast progress in miniaturization of electronic devices requires new approach not only in the technology, producing nanometric and subnanometric objects, but also in their characterization. EMCD – electron magnetic circular dichroism represents a new method, which uses the electron transmission microscope to determine the magnetic moments of atoms from which consists the object investigated.   The full text >>

Simultaneous spin and metal-insulator transition in transition metal compounds

In many magnetic materials it is possible to change the size of the magnetic moments, typically reduce, by application of pressure. Such transition is usually abrupt and sometimes is accompanied transtion to a metallic state. Using the LDA+DMFT computational scheme we were able to obtain such a behavior in MnO and Fe2O3 in agreement with experimental observations. We have identified the microscopic mechanisms responsible for these transitions and explained the observed changes in the density of the materials accompanying the transition.   The full text >>

Applications of hybride magnetic nanoparticles in medicine and biology

Synthesized stable water suspensions of manganese perovskites magnetic nanoparticles of the composition La1-xSrxMnO3 of advantageous properties markedly exceeding the behaviour of the existing commercial products on the basis of iron oxides. They afford higher heating efficiency and simultaneously controlled heating excluding the local overheating risk of a health tissue.

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Spin transitions in cobaltites

The result of our research is an unified description of the magnetic and electric transitions in cobaltites LnCoO3 (Ln = La, Y, rare earths), associated with thermally activated changes of the spin state of the octahedrally coordinated Co3+ ions, and the determination of the polaron character of the hole and electron carriers in doped cobaltites.
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