Jul 01, 1976 Magnetic properties and structure of chromium niobium oxide and iron tantalum oxide Christensen, A. N. Johanssen, T. Lebech, B. Abstract. Publication Journal of Physics C Solid State Physics. Pub Date July 1976 DOI 10.1088 0022.
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Request PDF Magnetic properties and structure of chromium niobium oxide and iron tantalum oxide Crystal structures were obtained from X ray powder patterns. The magnetic properties were.
Properties of chromium niobium oxide and iron tantalum oxide 2605 constant temperature, a magnetic moment develops and increases with time by 30 50 x. At higher fields (2.5 T) the moment increases by approximately 10 . At temperatures above 30 K the magnetic moment saturates almost immediately after the magnetic.
A new series of nine nitronyl nitroxide Cr(III) complexes with various β diketonates, [Cr(β diketonato) 2 (NIT2py)]PF 6, have been synthesized where NIT2py is 2 (2′ (pyridyl) 4,4,5,5 tetramethyl 4,5 dihydro 1H imidazolyl 3 oxide 1 oxyl, and their structures, magnetic and optical properties have been examined.X Ray analysis of [Cr(dpm) 2 (NIT2py)]PF 6 (monoclinic, space group P2 1 a, a.
Their magnetic properties were then examined by superconducting quantum interference device and electron paramagnetic resonance methods. A typical nanowire measured 10–15 nm in diameter and 600 nm in length. All the structural and magnetic investigations were consistent with the nanowire goethite structure.
Nickel Oxide (NiO) is an important transition metal oxide with cubic lattice structure. Among the magnetic nanoparticles, fabrication of nickel nanoparticles is often difficult than that of the other particles. This is because they are easily oxidized. To achieve pure nickel nanocrystals, numerous methods have been conducted in organic environments in order to prevent formation of.
Magnetic properties of iron cluster chromium matrix nanocomposites Arne€Fischer 1, Robert€Kruk1, followed by a complete characterization of structure and magnetic performance. Relevant magnetic characteristics, Oxide dispersion strengthened alloys (ODS) are exceptions, as the distribution of oxide.
Herein I report the synthesis of a new family of organometallic reduced mesoporous niobium oxide composites with mixed oxidation state organometallic nanowires in the pores and investigate their electronic and magnetic properties. This is a wonderful system which allows us to systematically study one dimensional molecular metals based on the respective organometallic species and the reducible.
Mar 01, 2011 Under the reaction conditions employed, four iron oxides are commonly formed. These are Fe 3 O 4 (magnetite), γ Fe 2 O 3 (maghemite), α Fe 2 O 3 (hematite) and α FeO(OH) (goethite). Among them two magnetite and maghemite are magnetic (Perez et al., 1998).Fig. 2A and B shows the X ray diffraction patterns of MWCNTs and MWCNTs nano iron oxide composites.The two peaks.
May 13, 2002 Chromium oxide (CrOX) and iron oxide (FeOX) films have been grown onto various substrates using pulsed laser deposition. CrOX films grown onto Si and LaAlO3 substrates at 390 C with a laser beam of 450 mJ pulse at 20 Hz are found to exhibit a (200) peak in the x ray diffraction spectra corresponding to the rutile structure of CrO2. X ray and scanning electron microscopy data indicate.
Chromium oxide (CrO X ) and iron oxide (FeO X ) films have been grown onto various substrates using pulsed laser deposition. CrO X films grown onto Si and LaAlO 3 substrates at 390 C with a laser beam of 450 mJ pulse at 20 Hz are found to exhibit a (200) peak in the x ray diffraction spectra corresponding to the rutile structure of CrO SUB 2 SUB .
May 13, 2002 Chromium oxide (CrO X) and iron oxide (FeO X) films have been grown onto various substrates using pulsed laser deposition. CrO X films grown onto Si and LaAlO 3 substrates at 390 C with a laser beam of 450 mJ pulse at 20 Hz are found to exhibit a (200) peak in the x ray diffraction spectra corresponding to the rutile structure of CrO 2 .
Jan 28, 2003 Cr 2 O 3 nanoparticles of controlled particle size were prepared by calcination of a precursor, Cr(OH) 3, obtained by precipitation with sodium hydroxide.Samples were characterized by transmission electron microscopy and x ray diffraction. Average particle sizes ranged from 20 to 200 nm. The magnetic properties of Cr 2 O 3 nanoparticles show the presence of a net magnetic moment at.
Structure, magnetic, and electric properties of bismuth niobates doped with d elements I. Magnetic behavior of chromium containing solid solutions of low and high temperature bismuth orthoniobate.
Structure, magnetic, and electric properties of bismuth niobates doped with d Elements VI. substitution of niobium by chromium atoms on the phase transition and electrophysical properties of.
The magnetic susceptibility and electrophysical properties of chromium containing Bi5Nb3−3x Cr3x O15−δ solid solutions with the perovskite like structure were studied.
Feb 03, 2019 Aluminothermic production of high purity chromium metal accounts for over 95 of chromium metal produced today. The first step in this process requires that the chromite ore is roasted with soda and lime in the air at 2000 F (1000 C), which creates a sodium chromate containing calcine.It can be leached away from the waste material and then reduced and precipitated as chromic oxide (Cr.
Jun 11, 2019 Researchers at North Carolina State University have found that the oxide ceramic material lanthanum strontium manganite (LSMO) retains its magnetic properties.
The oxide ceramic material lanthanum strontium manganite (LSMO) retains its magnetic properties in atomically thin layers if it is 'sandwiched' between two layers of a different ceramic oxide.
The structural and magnetic properties of copper (Cu) and aluminum (Al) incorporated chromium oxide (α Cr2O3, i.e., chromia) inverted core shell nanoparticles (CSNs) were investigated. The objectives of this study were to determine the role of the substituting (for chromium, Cr) element and of Cu concentration on governing the magnetic properties of the CSNs.
US2956955A US8244A US824460A US2956955A US 2956955 A US2956955 A US 2956955A US 8244 A US8244 A US 8244A US 824460 A US824460 A US 824460A US 2956955 A US2956955 A US 2956955A Authority US United States Prior art keywords chromium ferromagnetic chromium oxide magnetic particles Prior art date 1960 02 12 Legal status (The legal status is an assumption and is.
Abandoned chromium production sites often require environmental cleanup. Chromium is remarkable for its magnetic properties it is the only elemental solid which shows antiferromagnetic ordering at room temperature (and below). Above 38 C, it transforms into a paramagnetic state. Chromium is a member of the transition metals, in Group 6.
Thickness Dependence of Magnetic and Transport Properties of Chromium Dioxide (CrO2) Strained Epitaxial Thin Films A. Anguelouch, A. Gupta, and Gang Xiao Abstract— Chromium dioxide (CrO2) thin films of different thicknesses (120–2600 A ) have been grown epitaxially on (100) oriented TiO2 substrates by the chemical vapor deposition technique.
Ores. Niobium occurs mostly as an oxide and has a strong geochemical coherence with tantalum. Major minerals of niobium are pyrochlore [(Na, Ca) 2 Nb 2 O 6 F] and columbite [(Fe, Mn)(Nb, Ta) 2 O 6], consisting of niobate, tantalate, iron, and manganese.Pyrochlore occurs usually in carbonatites and in pegmatite derived from alkalic rocks, commonly in association with zirconium, titanium.