scholarly journals A magnetic study of the iron-nickel-aluminium system

1939 ◽  
Vol 171 (947) ◽  
pp. 525-540 ◽  
Keyword(s):  
Magnetic Properties ◽  
X Ray ◽  
Nickel Iron ◽  
Fundamental Properties ◽  
Saturation Intensity ◽  
Structure Changes ◽  
Iron Nickel ◽  
The Subject ◽  
High Fields ◽  
Ferromagnetic Magnetization

The iron-nickel-aluminium ternary system has been brought into prominence in recent years on account of its application in the permanent magnet industry. A study of some magnetic properties of this system has been made by Köster (1932-3), but his work is largely concerned with features other than those dealt with by the writer. An exhaustive X-ray examination of these alloys has been carried out by Bradley and Taylor (1938), and the information obtained has been used to throw light on the permanent magnetism in this system (Bradley and Taylor 1937 a, b, c ). Through the collaboration of Dr Bradley the writer has been able to make magnetic investigations on the same specimens as were used in the X-ray analysis, and the present account deals with a survey of the variation of the saturation intensity of these alloys with temperature. Owing to the complexity of the magnetic properties of alloys in this system, it is essential that the more fundamental properties should be the subject of the first investigation. The properties of ferromagnetic materials in low magnetizing fields depend to a considerable extent upon heat treatment, whilst on the other hand the saturation intensity in high fields shows less variation, and is in some degree a measure of the number of elementary magnets, presumably electron spins, contributing to the ferromagnetic magnetization of the particular alloy. Furthermore, the variation of the saturation intensity with temperature should give indications of any structure changes which may occur. A new method for the rapid measurement of saturation intensities for a few milligrams of substance over a range of temperature has been evolved (Sucksmith 1939) and the method there described has been used in the investigation on the nickel-iron-aluminium system.

scholarly journals Structural and Magnetic Properties of FePd Thin Film Synthesized by Electrodeposition Method

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1454
Author(s):  
Gabriele Barrera ◽  
Federico Scaglione ◽  
Matteo Cialone ◽  
Federica Celegato ◽  
Marco Coïsson ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetic Properties ◽  
Deposition Time ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fundamental Properties ◽  
Magnetic Features ◽  
Application Fields

Bimetallic nanomaterials in the form of thin film constituted by magnetic and noble elements show promising properties in different application fields such as catalysts and magnetic driven applications. In order to tailor the chemical and physical properties of these alloys to meet the applications requirements, it is of great importance scientific interest to study the interplay between properties and morphology, surface properties, microstructure, spatial confinement and magnetic features. In this manuscript, FePd thin films are prepared by electrodeposition which is a versatile and widely used technique. Compositional, morphological, surface and magnetic properties are described as a function of deposition time (i.e., film thickness). Chemical etching in hydrochloric acid was used to enhance the surface roughness and help decoupling crystalline grains with direct consequences on to the magnetic properties. X-ray diffraction, SEM/AFM images, contact angle and magnetic measurements have been carried out with the aim of providing a comprehensive characterisation of the fundamental properties of these bimetallic thin films.

scholarly journals Note on Heuslerʼs magnetic alloy of manganese, aluminium, and copper

1906 ◽  
Vol 77 (516) ◽  
pp. 256-259 ◽  
Keyword(s):  
Magnetic Properties ◽  
British Association ◽  
Magnetic Alloy ◽  
Physical Laboratory ◽  
Iron Nickel ◽  
The Subject

In 1903 Fr. Heusler published the discovery of an alloy consisting of manganese, aluminium, and copper, which, in spite of the fact that it contained none of the so-called magnetic metals, iron, nickel, or cobalt, possessed striking magnetic properties. Short accounts of work on the subject by Heusler and some other experimenters appeared, but on the whole the discovery seems to have aroused comparatively little interest in this country before August, 1904, when R. A. Hadfield exhibited a specimen of the alloy at the Cambridge meeting of the British Association. At the beginning of the winter session 1904 an attempt was made to obtain some of this alloy for the Physical Laboratory of Glasgow University, with the view of determining magnetic curves for the material, and of otherwise extending our knowledge of this interesting manganese bronze.

Ferromagnetic Co-P Powders with Nanodiamond and Corundum Precipitates

2012 ◽  
Vol 190 ◽  
pp. 470-473 ◽  
Author(s):  
O.A. Goncharova ◽  
L.A. Chekanova ◽  
E.A. Denisova ◽  
S.V. Komogortsev ◽  
Rauf S. Iskhakov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Chemical Reduction ◽  
Detonation Nanodiamond ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
X Ray ◽  
Magnetization Dependence ◽  
Applied Fields ◽  
Ferromagnetic Magnetization

Powders of Ñî-Ð alloy with ultradispersed corundum (Al2O3) and detonation nanodiamond (DND) precipitates were synthesized by chemical reduction. The products were characterized by X-ray diffraction and scanning electronic microscopy. The shape of the particles was spherical and they were ferromagnetic. Magnetization dependence on field in applied fields of up to 40 kOe and magnetization dependence on temperature in the temperature range from 2 to 300 K were measured. Influence of precipitates on magnetic properties was studied.

scholarly journals Σύνθεση και χαρακτηρισμός μεταλλικών πλειάδων υψηλού σπιν και μονομοριακών μαγνητών

2015 ◽  
Author(s):  
Εμμανουήλ-Αλέξανδρος Περιβολάρης
Keyword(s):  
Magnetic Properties ◽  
Coordination Chemistry ◽  
Chemical Reactivity ◽  
Atmospheric Oxygen ◽  
Organic Ligands ◽  
X Ray ◽  
Nickel Iron ◽  
X Ray Crystallography ◽  
Depth Study ◽  
Iron And Manganese

The combination of a-benzoin-oxime (aboH2) in the coordination chemistry of NiII leadsto the formation of octanuclear clusters which contain an unusual peroxo anion derivedby the reduction of atmospheric oxygen while the reducing agent appears to be theorganic ligand (aboH2) which was found within the clusters in its oxidized form as theanion of a-benzil monooxime (abmoH). The in-depth study of the above reaction systemand the chemical reactivity of the octanuclear cages led to the synthesis of a family ofNiII clusters which counts over 20 family members built around a ι6-δ 3:δ 3-Ο2 2-. Thecombination of pseudochalides and other organic ligands in the above reaction systemdid not alter the cores of the octanuclear clusters but caused significant structuralchanges which in turn drastically changed the magnetic properties of the clusters. Theclusters were characterized by X-ray crystallography, spectroscopic and physicalmethods while their magnetic properties were also investigated.In the second part of this thesis, was completed the study of the magnetic properties ofa family of hexanuclear MnIII cages, while was also studied the coordination chemistryof other oxime ligands in combination with nickel, iron and manganese.

METGLAS ALLOY 2826

Alloy Digest ◽  
1976 ◽  
Vol 25 (11) ◽  
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Liquid State ◽  
Single Phase ◽  
Heat Treating ◽  
High Permeability ◽  
Metallic Material ◽  
Nickel Iron ◽  
Rapid Quench ◽  
Chemical Corporation

Abstract METGLAS Alloy 2826 (Fe40Ni40P14B6) is a ferromagnetic, high permeability, nickel-iron metallic glass which, when appropriately annealed, yields a material similar to the higher nickel containing permalloys in magnetic properties. Alloy 2826 is a single phase, opaque metallic material with a glass-like structure obtained by a very rapid quench from the liquid state. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on forming and heat treating. Filing Code: Ni-235. Producer or source: Allied Chemical Corporation.

Effect of Annealing temperature on the Structural and Magnetic Properties of TbxY3-xFe5O12(x = 0.0, 1.0, 2.0) Thin Films Prepared by Sol-Gel Process

2012 ◽  
Vol 501 ◽  
pp. 236-241 ◽  
Author(s):  
Ftema W. Aldbea ◽  
Noor Bahyah Ibrahim ◽  
Mustafa Hj. Abdullah ◽  
Ramadan E. Shaiboub
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Vibrating Sample Magnetometer ◽  
X Ray ◽  
Garnet Phase ◽  
Sol Gel Process ◽  
Amorphous Structures

Thin films nanoparticles TbxY3-xFe5O12 (x=0.0, 1.0, 2.0) were prepared by the sol-gel process followed by annealing process at various annealing temperatures of 700° C, 800° C and 900° C in air for 2 h. The results obtained from X-ray diffractometer (XRD) show that the films annealed below 900°C exhibit peaks of garnet mixed with small amounts of YFeO3 and Fe2O3. Pure garnet phase has been detected in the films annealed at 900°C. Before annealing the films show amorphous structures. The particles sizes measurement using the field emission scanning electron microscope (FE-SEM) showed that the particles sizes increased as the annealing temperature increased. The magnetic properties were measured at room temperature using the vibrating sample magnetometer (VSM). The saturation magnetization (Ms) of the films also increased with the annealing temperature. However, different behavior of coercivity (Hc) has been observed as the annealing temperature was increased.

scholarly journals Ionic and non-ionic intravenous X-ray contrast media: antibacterial agents?

2021 ◽  
pp. 028418512110198
Author(s):  
Frank Mosler ◽  
Johannes K Richter ◽  
Marc Schindewolf ◽  
Nando Mertineit ◽  
Hendrik von Tengg-Kobligk ◽  
...  
Keyword(s):  
Contrast Media ◽  
Bactericidal Effect ◽  
Future Research ◽  
Inhibitory Effects ◽  
X Ray ◽  
Percutaneous Abscess Drainage ◽  
Ionic Contrast ◽  
Bactericidal Effects ◽  
Free Iodine ◽  
The Subject

X-ray contrast media have been reported to have inhibitory effects on bacterial growth. Despite its potentially beneficial effect on patients, these features of contrast media have received relatively little attention in the medical literature in the past decades. The aim of this review is to evaluate the literature concerning the bactericidal and bacteriostatic effects of X-ray contrast media, specifically if there is a known difference concerning these effects between ionic and non-ionic contrast media. Systematic literature review was performed for the years of publication between 1911 and 2019. Since the publication of Grossich in 1911, the effect of iodine on the treatment of superficial infections in surgical procedures has been established clinical knowledge. Bacteriostatic and bactericidal effects of ionic X-ray contrast media are well established. However, non-ionic contrast agents have been the subject of little research in this respect. In past decades, the hypothesis emerged in the literature that mainly the concentration of free iodine might be responsible for any bacteriostatic or bactericidal effect of ionic X-ray contrast media. Nowadays, however, only non-ionic contrast media are used. The question regarding the mechanism and magnitude of bacteriostatic or bactericidal effects of these, non-ionic contrast media, could not be answered conclusively from this review. Non-ionic contrast media could be used intentionally when a local antibacterial effect is intended (e.g. in percutaneous abscess drainage), as well as to reduce the overall dose of antibiotics administered to a patient. Thus, this question remains relevant and might constitute the area of future research.

scholarly journals Reversible magnetism switching of iron oxide nanoparticle dispersions by controlled agglomeration

2021 ◽  
Author(s):  
Stephan Müssig ◽  
Björn Kuttich ◽  
Florian Fidler ◽  
Daniel Haddad ◽  
Susanne Wintzheimer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Light Scattering ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Dispersions ◽  
Oxide Nanoparticle

The controlled agglomeration of superparamagnetic iron oxide nanoparticles (SPIONs) was used to rapidly switch their magnetic properties. Small-angle X-ray scattering (SAXS) and dynamic light scattering showed that tailored iron oxide...

(thf)2Ln(Ge9{Si(SiMe3)3}3)2 (Ln = Eu, Sm): the first coordination of metalloid germanium clusters to lanthanides

2021 ◽  
Author(s):  
Andreas Schnepf ◽  
Svetlana Klementyeva ◽  
Claudio Schrenk ◽  
Marat M Khusniyarov ◽  
Minghui Zhang
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Crystallographic Analysis ◽  
Rare Earth Complexes ◽  
Group 14 ◽  
X Ray ◽  
Germanium Clusters

We report the synthesis, structure and magnetic properties of the first rare earth complexes of metalloid group 14 clusters [(thf)2Ln(Ge9Hyp3)2] (Ln = Eu, Sm, Hyp = Si(SiMe3)3). X-ray crystallographic analysis...

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