List of Soft Magnetic Materials

List of Soft Magnetic Materials

S. No.	Material / Alloy	Approximate Properties	Category / Characteristics / Applications
1	Soft Iron	High permeability; low coercivity	Nearly pure iron that magnetizes and demagnetizes easily; used in electromagnets, magnetic cores and laboratory equipment.
2	Silicon Steel	Typically 1–4% silicon, depending on grade	Iron-silicon electrical steel with reduced core losses; widely used in transformers, electric motors and generators.
3	Grain-Oriented Electrical Steel (GOES)	Strong preferred magnetic orientation	Optimized for magnetization along a particular direction; commonly used in transformer cores.
4	Non-Grain-Oriented Electrical Steel (NGOES)	More uniform magnetic properties in the sheet plane	Used in rotating electrical machines, including motors and generators, where magnetic flux changes direction.
5	Permalloy	Nickel-iron alloy; very high permeability in suitable grades	Commonly based on nickel and iron; used in magnetic shielding, sensitive sensors and low-field magnetic components.
6	Mu-metal	Very high magnetic permeability	A nickel-iron-based alloy with small additions of other elements; used to shield sensitive instruments from low-frequency magnetic fields.
7	Supermalloy	Extremely high permeability in suitable conditions	A specialized nickel-iron-molybdenum alloy used in sensitive magnetic devices and low-field magnetic shielding.
8	Sendust	Iron-silicon-aluminium alloy	Soft magnetic alloy with low magnetostriction and useful core-loss characteristics; used in inductors, magnetic heads and electronic components.
9	High-Flux Alloy	Nickel-iron alloy; high saturation flux density	Commercial soft magnetic alloy family with high nickel content; used in power inductors, transformers and magnetic components requiring high flux capacity.
10	Supermalloy-Type Nickel-Iron Alloys	High permeability; composition-dependent	Specialized nickel-iron alloys engineered for low coercivity and sensitive magnetic applications.
11	Permendur	Iron-cobalt alloy; high saturation magnetization	Typically an iron-cobalt alloy with a small vanadium addition; used in magnetic circuits, high-performance electromagnets and specialized electrical machines.
12	Hiperco Alloys	High saturation magnetic flux density	Commercial iron-cobalt-based soft magnetic alloys used in aerospace actuators, motors, generators and compact magnetic circuits.
13	Soft Ferrites	High electrical resistivity; composition-dependent permeability	Ceramic magnetic materials, commonly based on iron oxides combined with manganese-zinc or nickel-zinc compounds; used in high-frequency transformers, inductors and filters.
14	Mn-Zn Ferrite	High permeability; suitable for many lower-frequency and switching-power applications	Manganese-zinc soft ferrite used in transformer cores, power supplies, inductors and electromagnetic interference suppression.
15	Ni-Zn Ferrite	High resistivity; useful at higher frequencies	Nickel-zinc soft ferrite used in radio-frequency components, antennas, filters, noise suppression and inductors.
16	Amorphous Magnetic Alloys	Low coercivity; potentially low core losses	Metallic alloys without long-range crystalline order; used in efficient transformer cores, power electronics and magnetic sensors.
17	Iron-Based Amorphous Alloy	High saturation magnetization; low core losses in suitable designs	Iron-rich amorphous alloy family used in energy-efficient distribution transformers and magnetic components.
18	Cobalt-Based Amorphous Alloy	Low coercivity; composition-dependent saturation magnetization	Used in specialized magnetic sensors, precision magnetic components and applications requiring particular magnetic characteristics.
19	Nanocrystalline Magnetic Alloys	High permeability; low coercivity and low losses in suitable grades	Fine-grained alloys, often produced by controlled crystallization of amorphous precursors; used in common-mode chokes, transformers and precision current sensors.
20	FINEMET	High permeability; low coercivity	A commercial iron-based nanocrystalline alloy family; used in power electronics, noise filters, transformers and current sensors.
21	NANOPERM	High saturation magnetization; composition-dependent losses	An iron-based nanocrystalline soft magnetic alloy family used in inductors, transformers and power-electronic magnetic components.
22	Co-based Nanocrystalline Alloys	Potentially high permeability and low coercivity	Specialized nanocrystalline materials investigated or used for precision magnetic components and sensing applications.
23	Soft Magnetic Composites (SMCs)	Magnetically insulated particles; three-dimensional flux capability	Powder-based materials with electrically insulated magnetic particles; used in compact motors, actuators and components with complex magnetic paths.
24	Iron Powder Cores	Distributed air gap; grade-dependent core losses	Pressed iron-powder cores used in inductors, power converters and energy-storage magnetic components.
25	Carbonyl Iron	Fine iron powder; frequency- and processing-dependent performance	High-purity iron powder used in specialized inductors, radio-frequency components and electromagnetic applications.
26	Soft Magnetic Iron-Cobalt Alloys	Very high saturation magnetization	Iron-cobalt-based materials used where high magnetic flux density is important, including aerospace and specialized electrical equipment.
27	Soft Magnetic Iron-Nickel Alloys	Permeability and saturation vary with composition	Used in magnetic shielding, relays, transformers, sensors and other low-field or precision magnetic applications.
28	Soft Magnetic Iron-Silicon-Aluminium Alloys	Low magnetostriction in suitable compositions	Includes Sendust-type materials used in inductors, magnetic recording components and electronic magnetic cores.
29	Soft Magnetic Thin Films	Thickness- and composition-dependent magnetic response	Thin magnetic layers engineered for low coercivity and specific domain behaviour; used in sensors, microelectronics and magnetic devices.
30	Soft Magnetic Multilayer Materials	Layer-dependent permeability and magnetic response	Engineered stacks of magnetic and nonmagnetic layers used in specialized sensors, high-frequency components and magnetic research.

Notes:

Soft magnetic materials are easily magnetized and demagnetized. They generally have low coercivity and a narrow magnetic hysteresis loop.
Important properties include magnetic permeability, saturation magnetization, coercivity, electrical resistivity, core loss and magnetostriction.
Soft magnetic materials are used in transformers, electric motors, generators, inductors, relays, electromagnets, sensors and magnetic shielding.
Silicon steel is widely used in conventional power-frequency transformers and electrical machines, while soft ferrites are especially useful in many high-frequency applications because of their high electrical resistivity.
Amorphous and nanocrystalline alloys can provide low core losses in suitable operating conditions, but their performance depends on composition, processing, frequency and magnetic flux density.
High permeability and high saturation magnetization are different properties. A material can excel in one without being the best in the other.
Commercial names such as Mu-metal, FINEMET, NANOPERM and Hiperco refer to particular alloy families or products; exact properties depend on grade and processing.
The listed materials are not all interchangeable. Selection depends on operating frequency, required flux density, temperature, geometry, cost and acceptable energy losses.

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List of Soft Magnetic Materials

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