What is a magnetization curve and what is the hysteresis loop?
A curve, or loop, plotted on B-H coordinates showing how the magnetization of a ferromagnetic material varies when subjected to a periodically reversing magnetic field, is known as Hysteresis Loop. Hysteresis Definition.
What does magnetization curve indicate?
The B-H curve or magnetisation curve is the graph plotted between magnetic flux density (B) and magnetising force (H). The B-H curve indicates the manner in which the magnetic flux density varies with the change in magnetising force.
Which materials has hysteresis loop?
However, soft ferromagnetic materials such as iron or silicon steel have very narrow magnetic hysteresis loops resulting in very small amounts of residual magnetism making them ideal for use in relays, solenoids and transformers as they can be easily magnetised and demagnetised.
Why do magnetic materials show different loop of hysteresis?
When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called a hysteresis loop.
What do you mean by hysteresis curve?
A hysteresis loop (also known as a hysteresis curve) is a four-quadrant graph that shows the relationship between the induced magnetic flux density B and the magnetizing force H. It is often referred to as the B-H loop. From hysteresis loops, we can determine a number of magnetic properties about a material.
What is called hysteresis?
hysteresis, lagging of the magnetization of a ferromagnetic material, such as iron, behind variations of the magnetizing field.
What is the meaning of magnetization?
Definition of magnetization : an instance of magnetizing or the state of being magnetized also : the degree to which a body is magnetized.
What is the application of hysteresis loop?
Applications of hysteresis loop: The significance of hysteresis loop is that it provides information such as retentivity, coercivity, permeability, susceptibility and energy loss during one cycle of magnetisation for each ferromagnetic material.
What are the factors affecting the hysteresis loop?
Factors Affecting Hysteresis Loss
- The loop of the hysteresis is narrow; the material will be magnetized very easily.
- Similarly, if the material doesn’t get magnetized simply, then the hysteresis loop will be large.
- At different values of ‘B’, different materials can saturate, so the loop height will be affected.
What is the shape of hysteresis loop?
15.3. The shape of a hysteresis loop can be diagnostic of the mineralogy of the sample (Channell and McCabe, 1994; Tauxe, 1993). Ferrimagnetic minerals tend to produce narrow loops, whereas the presence of antiferromagnetic minerals causes hysteresis loops to be wider.