Superconducting disk with magnetic coating: Re-entrant Meissner phase, novel critical and vortex phenomena

2007 ◽  
Vol 77 (2) ◽  
pp. 27005 ◽  
Author(s):  
M. V Milošević ◽  
M. T. I Rakib ◽  
F. M Peeters
Keyword(s):  
Magnetic Coating

Lubricant Effect on the Micro-Tribological Behavior of Magnetic Coating Formulations—Part 2: Comparison of the Results for the Miscellaneous Lubricants

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Medhat S. Farahat Khedr
Keyword(s):  
Stearic Acid ◽  
Magnetic Tape ◽  
Tribological Behavior ◽  
Test Sample ◽  
Carboxylic Group ◽  
Reference Guide ◽  
Chemical Structures ◽  
Comparison Of The Results ◽  
Commercial Lubricant ◽  
Magnetic Coating

The magnetic tape industry applies a mixture of stearic acid/butylstearate as a lubricant mixture in their formulation. This lubricant system has several disadvantageous points since it enhances corrosion to the GMR head, due to the existence of the stearic acid free carboxylic group; also, it is not chemically bonded to the tape surface and can freely leave the tape surface in time, leading to inferior winding/unwinding performance of the tape. In this work, we pursue our challenging task for finding a better lubricant(s) to resolve the problems with the current commercial lubricant system. We also continue working with the hypothesized model test sample which imitates the features for the real magnetic tape surface. The goal of this series of work is to correlate between the chemical structures for the miscellaneous lubricants and their micro-tribological behavior at the interface between the sample and reference guide surfaces.

Factors Influencing the Sensitivity of the CDMPI Sensor

2007 ◽  
Vol 124-126 ◽  
pp. 887-890
Author(s):  
Pratap Kollu ◽  
Seok Soo Yoon ◽  
Chong Oh Kim ◽  
Cheol Gi Kim
Keyword(s):  
Coating Layer ◽  
High Sensitivity ◽  
Dynamic State ◽  
Pickup Coil ◽  
Driving Frequency ◽  
Sensing Element ◽  
Ac Power ◽  
Lc Circuit ◽  
Square Wave Generator ◽  
Magnetic Coating

A highly sensitive magnetic sensor using the GMI (Giant Magneto Impedance) effect has been developed. The sensor performance is studied and estimated. The sensor circuitry consists of a Square wave generator (driving source), a sensing element in a form of composite wire of a 20μm copper core electrodeposited with a thin layer of soft magnetic material (Ni80Fe20), two amplifier stages for improving the gain from the sensor element, switching mechanism, scaler circuit, an ac power source driving the permeability of the magnetic coating layer of the sensing element into a dynamic state, and a signal pickup LC circuit formed by a pickup coil and an capacitor .The results showed that for high sensitivity and resolution (10-7 T), the frequency and magnitude of the ac driving current through the sensing element each has an optimum value, the resonance frequency of the signal pickup LC circuit should be equal to or twice as the driving frequency on the sensing element, and the anisotropy of the magnetic coating layer of the sensing wire element should be longitudinal.

Magnetic separation of pentlandite from serpentine by selective magnetic coating

2019 ◽  
Vol 26 (1) ◽  
pp. 1-10
Author(s):  
Ji-wei Lu ◽  
Zhi-tao Yuan ◽  
Xiao-fei Guo ◽  
Zhong-yun Tong ◽  
Li-xia Li
Keyword(s):  
Magnetic Separation ◽  
Magnetic Coating

The role of sodium oleate (NaOL) in the magnetic separation of pentlandite from serpentine using magnetic coating

2019 ◽  
Vol 345 ◽  
pp. 492-500 ◽  
Author(s):  
Jiwei Lu ◽  
Zhitao Yuan ◽  
Mingming Li ◽  
Xuan Zhao ◽  
Zhongyun Tong ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Sodium Oleate ◽  
Magnetic Coating

Giant magnetic impedance of wires with a thin magnetic coating

2011 ◽  
Vol 111 (2) ◽  
pp. 133-154 ◽  
Author(s):  
G. V. Kurlyandskaya ◽  
N. G. Bebenin ◽  
V. O. Vas’kovsky
Keyword(s):  
Magnetic Impedance ◽  
Magnetic Coating

Thin magnetic coating for low-frequency broadband microwave absorption

2014 ◽  
Vol 116 (24) ◽  
pp. 243911 ◽  
Author(s):  
Hu Zhao ◽  
Shiyao Xu ◽  
Dongming Tang ◽  
Yi Yang ◽  
Baoshan Zhang
Keyword(s):  
Microwave Absorption ◽  
Low Frequency ◽  
Magnetic Coating

Separation of hematite from banded hematite jasper (BHJ) by magnetic coating

2015 ◽  
Vol 22 (2) ◽  
pp. 437-444 ◽  
Author(s):  
Subhashree Singh ◽  
H. Sahoo ◽  
S. S. Rath ◽  
B. B. Palei ◽  
B. Das
Keyword(s):  
Magnetic Coating
Sign in / Sign up

Export Citation Format

Share Document