What is magnetic hysteresis explain BH curve for a ferromagnetic material?

Definition: Hysteresis refers to the lagging of the magnetization of a ferromagnetic material like iron. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called a hysteresis loop or B-H Curve.

What happens to a ferromagnetic material when it is placed in a magnetic field?

When a piece of ferromagnetic material is placed into an external magnetic field, two things happen. The spins in each domain shift so that the magnetic moments of the electrons become more aligned with the direction of the field.

What is the magnetic moment of a ferromagnetic material?

Ferromagnetic substances are used for making permanent magnets. In the absence of an external magnetic field, the magnetic moments of domains of ferromagnetic substance are randomly arranged, hence the net magnetic moment of a ferromagnetic substance is zero.

What is magnetic hysteresis curve?

Definition. Magnetic Hysteresis Curve represents the relation between magnetizing force (H) and magnetic flux intensity for ferromagnetic material. Another name for Magnetic Hysteresis Curve is B-H curve or simply Hysteresis loop. Thus Magnetic Hysteresis Curve introduces the lag or delay of a magnetic material.

How are ferromagnetic materials magnetised?

However, the material can be magnetized (made into a magnet) by placing it in a magnetic field. When this happens, all the magnetic domains line up, and the material becomes a magnet. Materials that can be magnetized are called ferromagnetic materials. They include iron, cobalt, and nickel.

What is a ferromagnetic material?

Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. Only a few substances are ferromagnetic. The common ones are iron, cobalt, nickel and most of their alloys, and some compounds of rare earth metals.

What is ferromagnetic hysteresis explain the ferromagnetic hysteresis on the basis of domain theory?

When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. The lack of retraceability of the magnetization curve is the property called hysteresis and it is related to the existence of magnetic domains in the material.