Magnetization relation to magnetic field applied

In summary, the conversation discusses the concept of magnetization in relation to NMR and MRI. The first question asks if the statement "If the applied magnetic field B0 is stronger, the magnetisation of material is greater" is correct. The second question is about the components of magnetization and how they contribute to NMR and MRI. It is clarified that magnetization is not solely a property of the material but can be induced by magnetic fields. The property of the material is called magnetic permeability.
  • #1
igurman
1
0
A few simple questions which I am not sure about, it's about NMR.

First sentence: "A magentic field B0 is applied on a sample, If the applied magnetic field B0 is stronger, the magnetisation of material is greater" . Would you say that sentence is correct? As I understood, magnetization is a property of the material, so it confuses me.

Second question is: does magnetization have only a longitudinal component? In which cases does it have a transverse one as well? and how does that contribute to NMR/MRI ?Thanks for assisting
 
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  • #2

What is magnetization and how is it related to the magnetic field applied?

Magnetization is the process by which a material becomes magnetized in the presence of a magnetic field. It is a measure of the strength and direction of the material's magnetic dipole moment. The relationship between magnetization and the magnetic field applied is described by the magnetic susceptibility, which is a material-specific constant that indicates how easily a material can be magnetized in the presence of a magnetic field.

How does the direction of the magnetic field affect magnetization?

The direction of the magnetic field has a significant impact on the resulting magnetization of a material. In most cases, the magnetic field must be applied in the same direction as the material's magnetic moments in order to achieve full magnetization. If the magnetic field is applied in the opposite direction, it can actually cause demagnetization.

What is the difference between paramagnetism and ferromagnetism in terms of magnetization?

Paramagnetism and ferromagnetism are two types of magnetism that describe how materials respond to an external magnetic field. In paramagnetic materials, the magnetic moments align with the external field, resulting in a weak overall magnetization. In ferromagnetic materials, the magnetic moments align with each other to create a strong overall magnetization, even in the absence of an external field.

How does temperature affect the relationship between magnetization and the magnetic field applied?

Temperature can have a significant impact on the magnetization of a material. In general, as the temperature increases, the magnetic moments in a material become more disordered, resulting in a decrease in overall magnetization. This can affect the relationship between magnetization and the magnetic field applied, as a higher temperature may require a stronger magnetic field to achieve the same level of magnetization.

What is the role of hysteresis in the magnetization process?

Hysteresis is the phenomenon in which the magnetization of a material lags behind changes in the applied magnetic field. It occurs because the magnetic moments in a material need time to align with the external field. This lag in response can result in a "memory" effect, where the material retains some level of magnetization even after the external field is removed. Hysteresis is an important factor to consider in practical applications of magnetization, such as in the design of magnetic storage devices.

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