New magnetic materials are now available with amorphous or nanocrystalline® atomic structure. They give the opportunity to tailor soft magnetic properties, especially high frequency and pulse applications.

Magnetic cores in the form of tape wound, toroidal or rectangular and cut cores are now available.

Amorphous Cores (Namglass 1 - Magnetic Metals Code 9101 for tape cores, MMG for cut cores) Nanocrystalline® Cores (Namglass 4 - Magnetic Metals Code 9001 for tape cores, MMN for cut cores) are now available with high permeability approaching that of supermalloy at low frequencies and with high permeability at high frequencies above 10kHz.

For pulse applications these cores are made with the insulating Namlite coating which drastically improves the performance in ultra short, high voltage pulse applications.

Nanocrystalline® Alloy -NANO
(for a pdf of the below information, click here)

Magnetic Metals NANO 9001: The composition is 82% Iron, with balance Silicon, Niobium, Boron, Copper, Carbon, Nickel and Molybdenum. This alloy is essentially a high flux with very low coercivity and power loss over wide range of Frequency. For these reasons this material is better performing to substitute for 80% nickels (1 and 1/2 mil.). The applications are for high frequency Transformers, current transformers, noise filter, Pulse Transformers and Magnetic parts for Switching Mode Power Supplies: Choke, Saturation Reactors.

Magnetic Properties:

Flux Density (Kgauss)=	12 -13.5
Squareness (Br/Bm) =	>.85 for square loop and .60 for round loop
Hc (Oersted) =	.04
Resistivity (micro-Ohm -cm) =	120 Micro-Ohm-cm
Curie temperature =	570C
Density (gnnicm3) =	7.3
Material thickness =	.7mil
Stacking Factor =	.75

NAMLITE COATING: to reduce eddy currents at high Frequency, the thinner gages of material are selected and the isolation between laminations (coating) becomes more important. For high Frequency applications (>50Khz.), Namlite coating is applied to Nano material to reduce the eddy current losses.

Comparison of a toroidal core with and without Namlite coating:

• Permeability:
  
  @ 100Gauss, 1Khz:
  

  Regular without Namlite coating =	70,000
  With Namlite coating =	40,000

  
  @ 100Gauss, 100Khz:
  

  Regular without Namlite coating =	15,000
  With Namlite coating =	20,000

  
  
• Core Loss:
  
  @1 Kgauss, 10Khz:
  

  Regular without Namlite coating =	.15 W/LB
  With Namlite coating =	.17 W/LB

  
  @ 1 Kgauss, 100Khz:
  

  Regular without Namlite coating =	8 W /LB
  With Namlite coating =	6 W/LB

Part numbers for NAND 9001 cores:

• Toroidal core:
  

  xxxx -P -9001:	For regular products / operating frequency < 50KHz
  xxxx -P -9001 -P:	With Namlite coating, for pulse applications or operating frequency> 50KHz

  NOTE: Magnetic Metals is processing Nano 9001 material for round loop applications. For square loop applications, customers should use AMOR 9101 mat'l for economical reasons.
  
  
• Cut core: MMN -xxxx:
  NOTE: For cut core, Magnetic Metals is processing material for high frequency applications With Namlite coating
  

Iron Based Amorphous Alloy -AMOR
(for a pdf of the below information, click here)

Magnetic Metals AMOR-9101: The composition is 80% Iron -with balance Boron, Silicon and Carbon. (Metglas® Alloy 2605 SA1). This alloy is essentially a high flux, square loop with reasonably low core loss at high frequencies, it is perfect for a wide range of applications, including Saturable reactors, DC inductors (chokes), Pulse transformers.This material is better performing and more economical to substitute for 50% Nickels (1 and 1/2 mil thick) and 3% G.O.S.S (1 mil thick).

MAGNETIC PROPERTIES

NAMLITE COATING: To reduce Eddy currents at high frequency, the thinner gages of material are selected and the isolation between laminations (coating) become important.

For high frequencies applications ( > 50Khz ), Namlite coating is applied to Arnor material to reduce the eddy current losses.

Comparison of a toroidal core with and without Namlite coating:

• Permeability:
  
  @ 100Gauss, 10Khz:
  

  Regular without Namlite coating =	15,000
  With Namlite coating =	10,000

  
  @ 100Gauss, 100Khz:
  

  Regular without Namlite coating =	6,000
  With Namlite coating =	8,000

  
  
• Core Loss:
  
  @1 Kgauss, 10Khz:
  

  Regular without Namlite coating =	1.5 W /LB
  With Namlite coating =	2 W /LB

  
  @ 1 Kgauss, 100Khz:
  

  Regular without Namlite coating =	50 W/LB
  With Namlite coating =	35 W /LB

Part numbers for AMOR -9101 cores:

Toroidal core: xxxx-P- 9101

Cut Core: MMG-xxxx

NOTE: Magnetic Metals is processing Arnor 9101 material for square loop with Namlite coating for high frequency applications.

For round loop, high Permeability applications, customers should use Nanocrystalline® mat'l (NANO 9001)