demagnetize

Definitions

  • WordNet 3.6
    • v demagnetize make nonmagnetic; take away the magnetic properties (of) "demagnetize the iron shavings","they degaussed the ship"
    • v demagnetize erase (a magnetic storage device)
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Webster's Revised Unabridged Dictionary
    • Demagnetize To deprive of magnetic properties; to render nonmagnetic. See Magnetize. "If the bar be rapidly magnetized and demagnetized ."
    • Demagnetize To free from mesmeric influence; to demesmerize.
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Century Dictionary and Cyclopedia
    • demagnetize To deprive of magnetic polarity.
    • demagnetize To demesmerize; restore from a mesmerized state to normal consciousness.
    • demagnetize Also spelled demagnetise.
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Usage

In literature:

It was only during the time of magnetization or demagnetization that these effects were produced.
"Faraday As A Discoverer" by John Tyndall
An air gap in a magnetic circuit always tends to hasten demagnetizing.
"Scientific American Supplement, No. 787, January 31, 1891" by Various
As soon, however, as the current through the wire ceases, the bar is again demagnetized.
"The Wonder Island Boys: The Mysteries of the Caverns" by Roger Thompson Finlay
I demagnetized it; now it runs all right.
"The Black Star Passes" by John W Campbell
The moment the current is cut off, the bar is demagnetized.
"Electricity for Boys" by J. S. Zerbe
It was only during the time of magnetization or demagnetization that these effects were produced.
"Little Masterpieces of Science:" by Various
His sensation was that of one being demagnetized.
"She Buildeth Her House" by Will Comfort
He magnetized and demagnetized steel needles by passing the discharge from his Leyden jars through the needles.
"The Story of Great Inventions" by Elmer Ellsworth Burns
Both in the process of magnetization and demagnetization.
"Hawkins Electrical Guide, Number One" by Nehemiah Hawkins
It's the only way to ground her wire and demagnetize her.
"Yellowstone Nights" by Herbert Quick
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In news:

Abrasive Belt, Demagnetizer Prove Key to New Conveying Solution.
X-Ray Laser Illuminate Fast Demagnetization Process.
It's not enough to cut an old credit card in half, demagnetize it too.
Rare earth elements (REEs) like neodymium and dysprosium can produce high-flux permanent magnets that can tolerate extreme temperatures without the threat of demagnetization.
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In science:

As was pointed out in introduction, in the weak-disorder regime, for z ≥ 4, a region around the origin in the (H − m) plane becomes inaccessible to any field history, which forbids a demagnetization process to be completed.
Metastable states and T=0 hysteresis in the random-field Ising model on random graphs
B is the Bohr magneton; h is the Planck constant; Nx (= Ny) and Nz are the demagnetizations.
Template nanowires for spintronics applications: nanomagnet microwave resonators functioning in zero applied magnetic field
The demagnetizing field ~Hdemag is computationally most expensive due to its ‘every individual magnetic moment interacts with every other magnetic moment from the rest of the sample’ nature.
Continuum multi-physics modeling with scripting languages: the Nsim simulation compiler prototype for classical field theory
This gives us the usual demagnetization field.
Pure and Random-Field Quantum Criticality in the Dipolar Ising Model: Theory of $Mn_{12}$ acetates
This demagnetization field would vanish for an ellipsoidal sample if x is a symmetry axis and would in general be small.
Pure and Random-Field Quantum Criticality in the Dipolar Ising Model: Theory of $Mn_{12}$ acetates
We propose a new scheme aimed at cooling nanostructures to microkelvin temperatures, based on the well established technique of adiabatic nuclear demagnetization: we attach each device measurement lead to an individual nuclear refrigerator, allowing efficient thermal contact to a microkelvin bath.
Method for Cooling Nanostructures to Microkelvin Temperatures
On a prototype consisting of a parallel network of nuclear refrigerators, temperatures of ∼ 1 mK simultaneously on ten measurement leads have been reached upon demagnetization, thus completing the first steps toward ultracold nanostructures.
Method for Cooling Nanostructures to Microkelvin Temperatures
However, in the demagnetized state we can extrapolate the NR temperatures below 10 mK based on warm up curves, as will be described below.
Method for Cooling Nanostructures to Microkelvin Temperatures
FIG. 3. (Color) (a) Systematic heating tests for chip D after demagnetization.
Method for Cooling Nanostructures to Microkelvin Temperatures
Inset: cooling of chips during demagnetization. R of thermometer D is plotted against the right axis for comparison in (b).
Method for Cooling Nanostructures to Microkelvin Temperatures
Given a heat leak sufficiently low for nuclear cooling, we now evaluate the demagnetization process itself, starting from Ti = 15 mK and Bi = 8 T.
Method for Cooling Nanostructures to Microkelvin Temperatures
Chip F warms up near the end of the demagnetization, while S is nearly constant.
Method for Cooling Nanostructures to Microkelvin Temperatures
We extract Tf and Te (> ∼ Tf ) of the NRs reached after demagnetizing to Bf by recording the time t necessary for a Cu plate to “completely” (T −1 e → 0) warm up under an applied power, using t = nΛB 2 f /(PappTf ) and Te=Tf (1 + κPapp/nΛB 2 f ), where Λ is the nuclear Curie constant for Cu [9, 15].
Method for Cooling Nanostructures to Microkelvin Temperatures
The other thermometers give consistent results, except for F, which appears to heat up during demagnetization.
Method for Cooling Nanostructures to Microkelvin Temperatures
With this, we obtain Tf (0) = 3.0±0.3 mK for all three Papp , demonstrating the reliability of achieving a particular minimum temperature for a set demagnetization parameters.
Method for Cooling Nanostructures to Microkelvin Temperatures
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