scholarly journals NATURE OF THE NATURAL RESIDUAL MAGNETIZATION OF MINING ORE

2020 ◽  
pp. 139-143
Author(s):  
B.I. Urusova ◽  
M.Z. Laypanov ◽  
F.A. Uzdenova
Keyword(s):  
Residual Magnetization

STUDIES OF F ON SUPERCONDUCTIVITY IN HIGH-Tc (Bi,Pb)SrCaCu(O,F) SUPERCONDUCTORS

1993 ◽  
Vol 07 (17) ◽  
pp. 1127-1132
Author(s):  
JIANGUO CAI ◽  
XIAOLONG ZHANG ◽  
XIANGHUA ZHOU ◽  
QIN WEI
Keyword(s):  
Critical Current Density ◽  
Flux Pinning ◽  
Weak Link ◽  
Meissner Effect ◽  
Experimental Methods ◽  
Residual Magnetization ◽  
High Tc ◽  
Bean Model ◽  
Pinning Potential ◽  
The Difference

In this article, the experimental results of the superconductivity in high-Tc (Bi,Pb) 2 Sr 2 Ca 2 Cu 3( O y, F x), x = 0–0.84, is described. Its critical current density Jc is about ten times larger than that of undoped F sample undergoing the same technology. The causes for the increase in Jc are studied by several experimental methods. The difference in quantity between Meissner effect and shield effect indicates that the effect on superconductivity is from the weak-link regions of the superconductor grains. SEM shows that F atoms doped in BPSCCO superconductor can make its grains grow larger, arrange regularly, and increase in touch area. These changes strengthen the netty link between grains. The magnitude of residual magnetization of F-doped sample is eight times as large as that of the undoped one. The flux pinning potential U0 is calculated from the Bean model. The U0 in F-doped sample (when H = 64 Oe, x = 0.64) is eight times as large as that in the undoped one.

scholarly journals Residual magnetization measurements of a motor to be used in satellites

2009 ◽  
Author(s):  
A. Matsuoka ◽  
K. Matsumura ◽  
A. Kubota ◽  
K. Tashiro ◽  
H. Wakiwaka
Keyword(s):  
Residual Magnetization ◽  
Magnetization Measurements

Magnetic Enhancement and Nitriding Process of Fe Atomic Layers on Si (111)-7×7-CH3OH Surface

2021 ◽  
Author(s):  
Wenxin Li ◽  
Wanyu Ding ◽  
Youping Gong ◽  
Dongying Ju
Keyword(s):  
Formation Mechanism ◽  
Room Temperature ◽  
Adsorption Process ◽  
Linear Structure ◽  
Atomic Layer ◽  
Residual Magnetization ◽  
Good Stability ◽  
Iron Nitride ◽  
Dissociation Process ◽  
Magnetic Performance

Abstract Fe atoms were steamed on Si(111)-7×7 surface, which had been saturated by CH3OH. Aim to greatly enhance the magnetic performance, nitriding experiments were implemented and adjusted on the existing linear Fe clusters. First of all, the dissociation of CH3OH adsorption process was deducted in detail, which laid a good foundation for the better use of surface quasi-potential. Further to solve the coming problems like weak linearity and low nitriding effect, the formation mechanism of iron-nitride was explored. Atomic layers of Fe deposition are confirmed as the key to NH3 dissociation process (at room temperature). Specifically, the higher Fe atomic layer contacted by NH3, the weaker influence of surface quasi-potential. With the introduction of Ar, Fe deposition could be controlled at 1-2 atomic layers, result in good NH3 dissociation and nitriding efficiency. Combing with magnetic performance result, the density of residual magnetization is improved from 1.5E-0.5 emu to 7.0E-0.5 emu, forming an obvious linear structure. It is also proved that our new linear iron-nitride clusters will maintain good stability with the improvement of nitriding efficiency.PACS: 07.79.Cz; 81.15.-z; 75.75.Fk

scholarly journals Investigation of the Impact of Load on the Magnetic Field Strength of the Crane by the Magnetic Metal Memory Technique

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5559
Author(s):  
Agnieszka Koson-Schab ◽  
Janusz Szpytko
Keyword(s):  
Residual Magnetization ◽  
Magnetic Memory ◽  
Metal Magnetic Memory ◽  
Magnetic Metal ◽  
Structural Inspection ◽  
The Impact ◽  
Non Destructive ◽  
The Magnetic Field ◽  
Flux Leakage ◽  
Destructive Methods

The paper deals with the problem of applicability of the metal magnetic memory (MMM) technique in the crane structural inspection and monitoring. The MMM method does not require the external magnetization of a structure that results in reduction of downtime of maintenance operations. Measurement of the intensity of the self-magnetic leakage signal can be an alternative to other non-destructive methods used for inspection of a large crane’s structure and equipment. However, the complexity of the residual magnetization effect in the MMM technique is the problem with its application. Thus, the magnetic flux leakage behavior on the crane girder surface under different measurements and the crane’s load conditions is analyzed based on the results obtained during experiments carried out on the overhead traveling crane.

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