Permalloy（(UNS N14080）

Permalloy is an alloy with exceptionally high magnetic permeability, very low coercive force, very low core losses, and low remanence by magnetic field annealing. The alloy finds application in magnetic shielding where fields much less than the Earth’s magnetic field are required. The highest volume applications using lamination or tape wound cores today are ground fault interrupter and modem transformer cores. The alloy is used as well in a variety of other high performance transformer core applications such as tape recorder heads and audio transformers. Control of the cooling rate during heat treatment and superimposition of various customer bake treatments are used to develop the most suitable magnetic quality for the application.

Physical Properties

AVAILABLE PRODUCTS AND SPECIFICATIONS

Features

High Magnetic Permeability:

• Permalloy has a very high magnetic permeability, which allows it to easily become magnetized in the presence of an external magnetic field. This property is crucial for efficient magnetic circuit design.

Low Coercivity:

• It exhibits low coercivity, meaning that it can be magnetized and demagnetized easily. This characteristic is essential for applications that require rapid switching of magnetic states.

Low Magnetostriction:

• Permalloy has low magnetostriction, which means it experiences minimal dimensional changes when subjected to a magnetic field. This property is important for precision applications where size stability is critical.

Good Ductility:

• The alloy can be easily formed and machined, allowing for the production of complex shapes and components.

Electrical Resistivity:

• Permalloy has relatively high electrical resistivity, which helps reduce eddy current losses in magnetic applications, enhancing overall efficiency.

Thermal Stability:

• Permalloy maintains its magnetic properties over a wide temperature range, making it suitable for various operating conditions.

Applications:

Magnetic Sensors

Transformers and Inductors

Data Storage Devices

Magnetic Shields

Microelectronic Devices

Magnetic Actuators

Biomedical Applications