Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Znaleziono wyników: 33
first rewind previous Strona / 2 next fast forward last
help Sortuj według:

help Ogranicz wyniki do:
1
100%
Archives of Materials Science and Engineering
EN Purpose: The aim of this review is recapitulating the FMR/EPR study of localized magnetic centers and clusters in co modified nanocomposites titanium dioxide by nitrogen and group of transitions magnetic metals. Design/methodology/approach: In some cases, modified in this way, titanium dioxides impr[...]
2
100%
Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The aim of this review is recapitulating the temperature dependence of FMR/EPR spectra of low concentration of magnetic nanoparticles and ultralow concentration localized magnetic centers (defects, free radicals, the lower oxidation state of titanium ions) in different materials. Design/met[...]
3
63%
Materials Science Poland
2006 Vol. 24, No. 4 901--912
EN Powder samples of (Er0.5Y0.5)2Cu 2O5 have been synthesized by a solid state reaction method. Electron spin resonance (ESR) measurements have been carried out on a Broker E 500 X-band spectrometer in the 4-300 K temperature range. A single, almost Lorentzian-shaped resonance line has been recorded fo[...]
4
51%
Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The aim of this review is recapitulating the FMR study of low concentration of magnetic nanoparticles in non-magnetic matrices. Design/methodology/approach: Magnetic nanoparticles exhibit a variety of anomalous magnetic properties and they could be used for forming low concentration in dif[...]
5
51%
Materials Science Poland
2005 Vol. 23, No. 4 929--938
EN Polycrystalline samples of (TbxY1 - x)2Cu2O5, where x = 1.0, 0.75, 0.50, 0.38, 0.25, 0.125 and 0, were synthesized by the solid-state reaction technique. XRD measurements showed that the obtained samples are single-phase and belong to the orthorhombic space group Pna21. The observed linear change of[...]
6
51%
Materials Science Poland
2005 Vol. 23, No. 4 1047--1054
EN A new SbVO5 compound, which can be synthesized from an equimolar mixture of Sb2O3/V2O5 or ?-Sb2O4/V2O5 oxides by heating in air to temperatures below 650 °C, is stable in air up to 710 °C and in argon atmosphere up to ~645 °C. At higher temperatures it decomposes into a phase with a rutile-type stru[...]
7
45%
Materials Science Poland
2006 Vol. 24, No. 4 1077--1085
EN Copper(II) hydrogenmalonate dihydrate complex has been studied by using the electron spin resonance (ESR) method. Numerically deconvoluted ESR spectra of Cu(II) ions have been investigated at 4.2-295 K temperature range. The powder ESR spectrum has been described by three g-factors and additionally [...]
8
45%
Materials Science Poland
EN The temperature dependence of dc magnetization and electron paramagnetic resonance (EPR) spectra of the b-Cu3Fe4V6O24 multicomponent vanadate were investigated. Dc magnetic measurements showed the presence of strong antiferromagnetic interactions (Curie-Weiss temperature, Q 80 K) at high temperature[...]
9
45%
Materials Science Poland
EN The electronic properties of multicomponent vanadate oxides M2InV3O11 (M(II) = Zn(II) and Co(II)) were investigated by electrical resistivity and electron paramagnetic resonance (EPR) measurements. Replacement of non-magnetic Zn(II) cations with magnetic Co(II) ions resulted in a significant drop in[...]
10
45%
Materials Science Poland
2005 Vol. 23, No. 4 955--960
EN Photoacoustic spectra of the d-d transitions for three different series of copper(II) complexes of spermidines Spn (Spn323, Spn333, Spn343), Spm (Spm323, Spm333, Spm343) and Spc (Spc323, Spc333) have been investigated. Replacements of distant atoms, the presence or absence of water molecule in the s[...]
11
45%
Materials Science Poland
2005 Vol. 23, No. 4 1029--1034
EN The neodymium(III) hydrazone complex [Nd(DBH)2(NO3)3] has been synthesized and characterized using microanalysis and IR spectroscopy. High-resolution photoacoustic spectrometry has been applied for studying the complex. The obtained photoacoustic spectrum has been analysed and compared to a similar [...]
12
39%
Materials Science Poland
2013 Vol. 31, No. 4 587--594
EN Two composites consisting of g-Fe2O3 (maghemite) nanoparticles covered by two different oxygen-based free radicals derived from a 4-(methylamino)phenol sulphate and 8-hydroxy-1,3,6-trisulfonic trisodium salt acid were prepared and investigated by the magnetic resonance method in the 4 – 300 K range.[...]
13
39%
Materials Science Poland
2013 Vol. 31, No. 4 601--610
EN Two samples containing phases formed in the FeVO4–Co3V2O8 system were prepared by a conventional sintering method. The sample designated as H5 was one-phase with the howardevansite-type structure, while the sample designated as HL7 contained a mixture of H-type and lyonsite-type structures. The temp[...]
14
39%
Materials Science Poland
2006 Vol. 24, No. 4 983--990
EN Ni2FeV3O11-.delat samples have been synthesized by the solid-state reaction method using two different heat treatment processes (samples of the type A and B). The XRD measurements have shown the same diffraction patterns for both types of samples. The temperature dependences of the electron paramagn[...]
15
39%
Materials Science Poland
EN Two nanocrystalline samples of TiC+SiC+20%C (sample 1) and Si3N4+Si(C,N)+Ti(C,N)+1%C (sample 2) were prepared by non-hydrolytic sol-gel method. The latter sample was produced from sample 1, by subjecting it to additional annealing at high temperature. XRD measurements showed the presence of aggregat[...]
16
39%
Elektronika : konstrukcje, technologie, zastosowania
PL Nanomateriał (Ti-Si-C(N)) został wytworzony metodą sol-żel w strumieniu gazowego azotu. Widmo ERP tego materiału składa się z bardzo wąskiej linii pochodzącej od zlokalizowanych centrów magnetycznych oraz z dodatkowego silnego i szerokiego sygnału znajdującego się w słabym polu magnetycznym. Obliczo[...]
EN The nanomaterial system (Ti-Si-C(N)) has been prepared by a sol-gel method in flowing nitrogen atmosphere. In its magnetic response a very wide ESR line has been observed, arising from localized magnetic centers, along with an additional very broad and intense line in low magnetic field. The pertine[...]
17
39%
Materials Science Poland
2005 Vol. 23, No. 4 899--907
EN Four samples, namely TiC/C, TiN/C, (TiC + FexCy + Fe)/C and TiN/amorphous carbon, have been prepared and investigated. In the former three samples titanium compounds were placed in a carbon matrix, while in the fourth one TiN was surrounded by an amorphous carbon. The samples have been characterized[...]
18
39%
Materials Science Poland
2005 Vol. 23, No. 4 923--928
EN Multicomponent vanadates, M3Fe4V6O24 (M = Mg(II), Mn(II), Zn(II), Co(II) and Cu(II)), have been synthesized by the solid-state reaction method using a stoichiometric mixture of MO, Fe2O3, and V2O5 oxides. They crystallize in the triclinic space ace group P1 and have a complicated structure with two [...]
19
39%
Materials Science Poland
2005 Vol. 23, No. 4 971--976
EN Four samples containing gamma-Fe2O3 magnetic nanoparticles dispersed at a concentration of 0.1 % (samples I and I') and 0.3 % (samples II and II') in a polymer matrix have been prepared. The polymer filler was in two forms: as solid-state grains (samples I and II) and as a liquid solution in trichlo[...]
20
39%
Materials Science Poland
2005 Vol. 23, No. 4 1055--1063
EN A binary magnetic nanoparticle system, consisting of Fe3O4 (35 wt. %), Fe3C (29 wt. %), and C (36 wt. %) filling in a PTMO-block-PET polymer at low concentration (0.3 %), has been synthesized. X-ray and SEM analyses have been carried out. The temperature dependence of the FMR spectrum of this system[...]
first rewind previous Strona / 2 next fast forward last