Introduction
Metallic non-crystalline magnetic alloys (MNAs) are materials composed primarily of metals, such as iron, cobalt, and nickel, and usually exhibiting ferrimagnetic properties. They may also contain additional elements such as carbon, boron, and chromium, as well as trace amounts of impurities. MNAs are ideal for applications where a high degree of magnetism is required, in addition to a higher electrical resistivity. MNAs are suitable for use in magnetic-sensitive products and components, including hard disk drives, magnetic read/write heads, and electric motors.
History
MNAs have been used for a variety of applications since their discovery in the 1950s. The first successful use of MNAs was in the fabrication of magnetic switches, which took advantage of the properties of these materials to interact with electromagnetic fields. Since then, MNAs have become an essential component in many commercial products that rely on the unusual and unique magnetic properties of the materials.
Structure
MNAs are composed of amorphous metallic glasses, nanoclusters, or an almost amorphous colloidal solution of fine metallic particles. These materials exhibit high magnetocrystalline anisotropy, which is a measure of the degree to which the magnetic properties of a material depend on its crystalline structure. This property makes MNAs particularly useful in applications where a high degree of magnetism is required.
Properties
MNAs exhibit several unique properties, which make them ideal for use in a variety of applications. These properties include a high electrical resistivity, high magnetization, low coercivity, and a high net magnetization. The high electrical resistivity makes MNAs suitable for use in applications that require high electrical resistivity, such as switchgear and power transformers. The high magnetization makes MNAs ideal for use in magnetic-sensitive products, such as hard disk drives and magnetic read/write heads. The low coercivity means that MNAs can be easily switched on and off without requiring high power input. Finally, the high net magnetization makes MNAs suitable for use in electric motors, in which the magnetic field generated by the motor is an important part of its operation.
Conclusion
Metallic non-crystalline magnetic alloys are an important type of material, due to their ability to combine high electrical resistivity, high magnetization, and low coercivity. These properties make MNAs ideal for a variety of applications, including switchgear, power transformers, hard disk drives, magnetic read/write heads, and electric motors. Additionally, MNAs exhibit high magnetocrystalline anisotropy, making them ideal for applications requiring a high degree of magnetism. As the technology advances and the development of new metallic alloys continues, MNAs are sure to remain an important part of the magnetic industry.
