![]() ![]() When there are so many elements in one material, it is not possible to tell that there is a "matrix" and there is a "dilute material," so all elements are somehow "equal" for the solid solution, but still behave differently due to their individual properties like the size, charge, number of electrons, electronegativity, etc. The main idea of the whole class of "high-entropy" materials is to mix five or more elements and to see how the macroscopic properties will change. "By probing the behaviour of individual components at the atomic scale, we would gain valuable clues for the further development of new complex systems with the desired multifunctionality," she says. Alevtina Smekhova, physicist at HZB and first author of the paper. ![]() "High-entropy alloys are an extremely diverse and exciting class of materials," says Dr. The results from the examined nanocrystalline film made of this alloy demonstrate some common trends as compared to a bulk sample, e.g., the largest lattice relaxations of Chromium and still intriguing magnetic behaviour of Manganese, which are consistent with the macroscopic magnetic behaviour of the film. By conventional magnetometry, the scientists proved the presence of magnetic phase transitions and found some signatures of a complex magnetic ordering with a coexistence of different magnetic phases.Ĭommon trends in bulk and nanofilm samples The magnetic properties of each element of the alloy were additionally probed using X-ray magnetic circular dichroism (XMCD) technique. To investigate the local environment of individual components, the team used multi-edge X-ray absorption spectroscopy (EXAFS) at BESSY II and then the reverse Monte Carlo method to analyse the collected data. ![]()
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