Materials Literature
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The hysteretic behaviour of some first-order magnetic phase transition materials with large magnetocaloric effect has been investigated by means of magnetic measurements. An unusual phase transition, so called 'virgin' effect, exists in some Mn-based compounds, but not in the Gd(5)[Si,Ge]4 and La(Fe,Si)13 compounds. I…
The iron pnictides and the cuprates represent two families of materials, where strong antiferromagnetic correlation drives three other distinct ordering tendencies: (1) superconducting pairing, (2) Fermi surface distortion, and (3) orbital current order. We propose that (1)-(3) and the antiferromagnetic correlation ar…
We study the light scattering by a hedgehog-like and linear disclination topological defects in a nematic liquid crystal. Propagating near such defects, the light feels an effective metric equivalent to the spatial part of the global monopole and cosmic string geometries. We obtain the diffraction pattern in terms of…
The phase separation between a striped polaron liquid at the particular density and a high density polaron liquid is described by a modified Van der Waals scheme. The striped polaron liquid represents the pseudo gap matter or Wigner-like polaron phase at 1/8 doping in cuprate superconductors. The model includes the te…
The 3D phase diagram of iron pnictides where the critical temperature depends on charge density and microstrain in the active FeAs layers is proposed. The iron pnictides superconductors are shown to be a practical realization of a heterostructure at the atomic limit made of a superlattice of FeAs layers intercalated b…
We present data of multi harmonic magneto-dynamic experiments. In particular, we performed ac magnetic susceptibility experiments on layered pnictide-oxide quaternary compound NdOFeAs doped with fluorine. The experiments allow measure the critical temperature and probe the flux dynamic behavior using the third harmoni…
We perform a theoretical investigation on the Goos-Hächen (GH) shift in one-dimensional photonic crystals (1DPCs) containing left-handed metamaterials (LHMs). We find an unusal effect of the GH shift near the photonic band-crossing structure, which is located at the condition, $% -k_{z}^{(A)}d_{A}=k_{z}^{(B)}d_{B}=mπ$…
In this study we investigate the propagation of uncertainties in the input forces through a mechanical system. The system of interest was a wheel loader, but the methodology developed can be applied to any multibody systems. The modeling technique implemented focused on efficiently modeling stochastic systems for whic…
In this paper, a model for predicting the performance and efficiency of an AMRC (active magnetic regenerative cascade) system is presented. The simulation studies a cascade system working with Gd(x)Tb(1-x) alloys as refrigerants, where the composition ratio is varied between the first and the second stage. The heat tr…
Namen diplomskega dela je bil optimiziranje reakcijskih parametrov (volumen oleinske kisline, cas sinteze) pri hidrotermalni sintezi BaFe12O19 z namenom doseci cim manjso velikost nanodelcev. Sintetizirane delce smo karakterizirali s termogravimetricno analizo (TGA) in ocenili velikost delcev s pomocjo rentgenske pras…
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Polyfluorenes (PFs) represent a unique class of poly para-phenylene based blue-emitting polymers with intriguing structure-property relationships. Slight variations in the choice of functionalizing side chains result in dramatic differences in the inter- and intra-chain structures in PFs. We present photoluminescence…
Sebagian kecil reaktor kimia dalam industri mempunyai daerah non ideal yaitu adanya daerah stagnan (dead zone), short circuiting, dan channeling yang menyebabkan berkurangnya efisiensi waktu tinggal cairan dalam reaktor. Untuk meningkatkan efisiensi dalam reaktor tersebut dapat dicapai dengan pendekatan waktu tinggal…
Pengembangan plastik mikroseluler dengan penambahan aditif telah banyak dilakukan karena penambahan aditif ke dalam polipropilen dalam pemrosesan ini menyebabkan berubahnya karakteristik dari foam polipropilen itu sendiri. Karakteristik tersebut meliputi densitas bulk, diameter sel, densitas sel dan rasio ekspansi vol…
The occurrences of diffuse scattering in the neutron diffraction patterns of the deuterides of Laves phase have frequently been reported,but have not been specifically studied.As the diffuse scattering indicates the formation of short range ordering of D and/or alloy atoms in the phase,we have particularly studied the…
FeCuCrVSiB soft magnetic films have been prepared using radio frequency sputtering without or with a constant magnetic field of about 72 kA/m along the longitudinal direction of film plane,and then their soft magnetic properties and giant magnetoimpedance(GMI) effects were measured.The results obtained show that the m…
PEOPLE UNDER STRESS may exhibit certain telltale signs that indicate they’re near a breaking point. Some, for example, will turn bright red just before they blow their top. Now, a new polymer does the same thing, changing color when stressed to the point of mechanical failure ( Nature 2009, 459, 68). Such a material c…
Proses perhitungan mix desain beton harus melewati beberapa tahapan sehingga perhitungan ini cukup memakan waktu. Oleh karena itu perlu dibuat suatu program bantu sehingga penentuan proporsi campuran dapat diselesaikan dengan waktu yang lebih cepat. Metode DOE dan ACI akan digunakan dalam program ini untuk kemudian ak…
Sebagian kecil reaktor kimia dalam industri mempunyai daerah non ideal yaitu adanya daerah stagnan (dead zone), short circuiting, dan channeling yang menyebabkan berkurangnya efisiensi waktu tinggal cairan dalam reaktor. Untuk meningkatkan efisiensi dalam reaktor tersebut dapat dicapai dengan pendekatan waktu tinggal…
Pengembangan plastik mikroseluler dengan penambahan aditif telah banyak dilakukan karena penambahan aditif ke dalam polipropilen dalam pemrosesan ini menyebabkan berubahnya karakteristik dari foam polipropilen itu sendiri. Karakteristik tersebut meliputi densitas bulk, diameter sel, densitas sel dan rasio ekspansi vol…