1,721,039 research outputs found
Transputer based parallel system for data acquisition and real time statistical analysis of signal jitter: application to single fiber electromyography. Report R1/162, PROGETTO FINALIZZATO SISTEMI INFORMATICI E CALCOLO PARALLELO, CNR, Roma, Italy, 1993.
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Advances in Magnetic Nanomaterials and Nanostructures
Full text linkMagnetic nanomaterials, in which non-bulk magnetic properties emerge because of their low dimension, are a class of materials with huge application potential in several areas, providing, at the same time, an exciting field of fundamental research [...
Magnetic Properties and Electronic Structures of Compounds from Hf-Co Phase System
No full textMagnetic measurements of molar susceptibilities as a function of temperature in the temperature
range between 5 and 400 K were performed for the intermetallic compounds Hf2Co and HfCo2,
using a SQUID magnetometer. The density of states at the Fermi level for Hf2Co was evaluated
from the measured spin paramagnetic susceptibility. In addition, band structure calculations using
the augmented plane waves plus local orbitals (APW+lo) method as implemented in the WIEN2k
programme package for the two compounds were done. The obtained results were compared with the
measured data
Charge-Ordering and Magnetic Transitions in Nanocrystalline Half-Doped Rare Earth Manganite Ho0.5Ca0.5MnO3
Full text linkThis work investigates nanostructured Ho0.5Ca0.5MnO3, considered a model system of the Ln0.5Ca0.5MnO3 series of manganites with perovskite structures featuring small lanthanide (Ln) ions half-substituted by Ca ions. Here, we propose a modified hybrid sol–gel–solid-state approach to produce multiple samples with a single batch, obtaining very high crystalline quality and ensuring the same chemical composition, with an average particle size in the range 39–135 nm modulated on-demand by a controlled calcination process. Our findings evidence that, provided the crystalline structure is preserved, the charge-ordering transition can be observed even at the nanoscale. Additionally, this research explores the presence of glassy phenomena, which are commonly seen in this class of materials, to enhance our understanding beyond simplistic qualitative observations. Comprehensive characterization using DC and AC magnetometry, along with relaxation and aging measurements, reveals that the complex dynamics typical of glassy phenomena emerge only at the nanoscale and are not visible in the bulk counterpart. Nevertheless, the analysis confirms that even the sample with the smallest nanoparticles cannot be intrinsically classified as canonical spin glass
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