magnetic parameters: remanence, intrinsic coercivity, andmagnetic energy product, BH max temperature stability of the magnetic parameters; ease of magnetizing the material; ease of forming the magnet into the desired shape; environmental factors, such as resistance to corrosion; and ...
Due to this strong temperature increase in such a thin layer of the Sun—the transition region—that thin layer is highly dynamic, and it should be possible for the energy to be transported down from the corona to the chromosphere via convective motion or conduction It may be the reason why...
Power converters are increasingly being operated at switching frequencies beyond 1 MHz to reduce energy storage requirements and passive component size. To achieve this miniaturization, designers of inductors and transformers need magnetic materials with good properties in the MHz regime. In this paper, ...
In time-reversal- (T-) symmetric, periodic systems – which most familiarly include nonmagnetic crystalline solids – the energy (Bloch) eigenstates respect the symmetries of the nonmagnetic (Type-II) Shubnikov space group (SSGs)10,11,12 [see Fig. 1 and Supplementary Note (SN) 2]. Though ...
Metallic magnetic materials encompass many of the materials of greatest technological importance, including soft magnets and permanent magnets for energy conversion applications, as well as materials for functions such as magnetostriction, shape memory, and magnetorefrigeration. This chapter, written by a ...
We use the Yamaguchi [46] formula for evaluation of the magnetic exchange coupling constant J for all systems, depicted as -(3)J=EBS-EHS〈S^2〉HS-〈S^2〉BSwhere EBS and EHS and 〈S^2〉BS and 〈S^2〉HS are the energy and average spin square values of BS states and their ...
Based on the relation between force and energy, the magnetic force Fm can be expressed as Equation (4) [22]; Fm = [(χpar − χsol)/μ0]v(B·∇)B (4) where χparχpar and χsolχsol are the susceptibilities of superparamagnetic particle and solution, respectively, and B·...
They tend to confirm that gravitational collapse begins with a relatively well-ordered magnetic field and that the turbulent energy does not dominate the magnetic energy within collapsing cloud cores. However, many of these sources are protostellar, which are expected to have a complex three-...
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He is best known to the general public for his mass-energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". He received the 1921 Nobel Prize in Physics for his services to theoretical physics, and especially for his discovery of the law of the ...