GM501

Magnetic properties toroidal boxed magnetic cores from amorphous and nanocrystalline alloys

GAMMAMET® 501

Magnetic cores GAMMAMET® 501 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. The alloy has high initial magnetic permeability, low coercive force and specific magnetic losses.

Magnetic cores GAMMAMET® 501 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).

Full service life of magnetic cores - 30 years.

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

Magnetic core Permeability μ0.08, not less Coercive force, А/m, not more В800, Т, not less
1 class 2 class 3 class 1 class 2 class 3 class 1 class 2 class 3 class
GM 501 100000 150000 200000 0,40 0,30 0,25 0,40 0,40 0,40

In full the order may be carried out only for magnetic cores GM501 - 1 class. Magnetic cores of higher class are choose from available production.

Use area: measuring transformers of a current and voltage, high-frequency transformers, matching transformers, magnetic modulators, high-sensitivity gauges, magnetic screens.

GAMMAMET® owns following patents of Russia which are used at manufacture of magnetic cores GM501: 2009246, 2009248, 200949.

The detailed information about magnetic properties of GM501 can be found in the book: Starodubtsev J.N., Belozerov V.J. "Magnetic properties amorphous and nanocrystalline alloys"

Typical physical properties
Magnetic induction, В800 0,43 T
Maximum permeability 600000
Coercive force 0,15 A/m
Squareness ratio Br/B800 0,6
Saturation magnetostriction <0,2×10-6
Specific electroresistance 1,4×10-6 Om×m
Density 7700 kg/m3
Curie temperature 160°C
Temperature of crystallization 570°C
Factor of thermal linear expansion 11×10-6К-1
Specific magnetic losses at frequency3<f<200 kHz
P = 3,6×10-6f1,72Bm2,12 (W/kg)
f – frequency (Hz), Вm – maximal magnetic induction (T)

Set of static loops of a magnetic hysteresis

Dynamic curves of magnetization

By digits on curves designate frequency in kHz. The curve f = 0 corresponds to the basic curve of magnetization

Magnetic permeability at the maximal Bm = 0,01 T

Influence of temperature