GM515A

Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys

GAMMAMET® 515A

Magnetic cores GAMMAMET® 503А are made of a ribbon by thickness 25 microns with nanocrystalline structure. The ribbon is produce by means of fast incandescence from an alloy on the basis of Co. After thermal processing in a longitudinal magnetic field magnetic cores have high rectangular loop of a magnetic hysteresis and by differ very high maximal differential magnetic permeability.

Magnetic cores may be produced with any standard sizes with external diameter up to 600 mm, with internal diameter not less than 8 mm, proportional 5 mm at height and are delivered in protective containers.

Sizes list of magnetic cores in protective containers you can see in Table 1. Weight and geometrical sizes of toroidal boxed magnetic cores

All magnetic cores have a class of thermal stability A (105°C). At will of the customer also magnetic cores may be produced with class F (155°C).

Full service life of magnetic cores - 30 years.

Next table of magnetic parameters is agreed with specifications ТУ 1261-030-12287107-2007:

Magnetic core Squareness ratio Kp800, not less Coercive force, А/м, not more Magnetic induction B800, T, not less
GM 515A 0,9 3,0 0,9

Use area: magnetic amplifiers, pulse transformers, sated reactors, magnetic keys.

GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM515A: 2187573, 2190275.

The detailed information about magnetic properties of GM503А can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"

Typical physical properties
Magnetic induction, В800 0,95 T
Initial relative magnetic permeability 150
Maximum permeability 250000
Coercive force 1,5 A/m
Squareness ratio Br/B800 0,94
Saturation magnetostriction <0,2×10-6
Specific electroresistance 1,3×10-6 Om×m
Density 7900 kg/m3
Curie temperature 500°C
Specific magnetic losses at frequency3<f<200 kHz
P = 4,6×10-4f1,4Bm1,3 (W/kg)
f – frequency (Hz), Вm – maximal magnetic induction (T)

Loop of a magnetic hysteresis

Curves of magnetization

Magnetic permeability