Will Magnetic Susceptibility Depend on Direction in Atom Arrangement?

In summary, the conversation discusses the magnetic properties of a line of atoms X and Y arranged periodically, where atom Y has S = L = 0 but atom X does not. The question is whether the magnetic moment will depend on the direction of the applied magnetic field in two different cases, one with no exchange interaction and the other with ferromagnetic exchange interaction and spin-orbit coupling. The conversation also briefly mentions the possibility of a material that is an isolator for positive particles and a supraleader for negative particles.
  • #1
salsero
41
0
Suppose there is a line of atoms X and Y. For atom Y, S = L = 0, but not for the atom X. The arrangement is like this:

--X-Y---X-Y---X-Y---X-Y-- (periodical)

In the following 2 cases, will the magnetic moment depend on whether the magnetic field is applied to the right or to the left? (The atoms are close enough to each other so that they orbitals may overlap.)

Case 1:
No exchange interaction.

Case 2:
Ferromagnetic exchange interaction exists between atoms X.
Atoms X have a spin-orbit coupling.

Thanks!
 
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  • #2
Originally posted by salsero
Suppose there is a line of atoms X and Y. For atom Y, S = L = 0, but not for the atom X. The arrangement is like this:

--X-Y---X-Y---X-Y---X-Y-- (periodical)

In the following 2 cases, will the magnetic moment depend on whether the magnetic field is applied to the right or to the left? (The atoms are close enough to each other so that they orbitals may overlap.)

Case 1:
No exchange interaction.

Case 2:
Ferromagnetic exchange interaction exists between atoms X.
Atoms X have a spin-orbit coupling.

Thanks!

There might be a material that through one end is an isolator for positive particles, but a supraleader for negative.
What if there is a such a material?
 
  • #3
Hi QuantumNet,

All materials are like this in some sence: the electrons are mobile, but the protons are not.

And in a diode the situation is uni-directional.

(Of course this has nothing to do with my original question).
 

What is magnetic susceptibility?

Magnetic susceptibility is a measure of the degree to which a material can be magnetized in the presence of an external magnetic field. It is a dimensionless quantity, typically denoted by the symbol χ, and is defined as the ratio of the magnetization (M) to the applied magnetic field (H).

How is magnetic susceptibility measured?

Magnetic susceptibility can be measured using a variety of techniques, including SQUID (Superconducting Quantum Interference Device) magnetometry, vibrating sample magnetometry, and electron spin resonance. These techniques involve applying a magnetic field to a sample and measuring the resulting magnetization.

What factors affect magnetic susceptibility?

Magnetic susceptibility is affected by a number of factors, including the composition and structure of a material, its temperature, and the strength of the applied magnetic field. In general, materials with unpaired electrons or with a high concentration of magnetic elements tend to have a higher susceptibility.

What is the significance of magnetic susceptibility in materials?

Magnetic susceptibility is an important property of materials in fields such as geology, mineralogy, and materials science. It can be used to identify and characterize minerals and rocks, as well as to understand the magnetic properties of materials for applications such as data storage and magnetic sensors.

How does magnetic susceptibility relate to magnetic permeability?

Magnetic susceptibility and magnetic permeability are closely related, as both properties describe a material's response to an applied magnetic field. Magnetic permeability is the measure of a material's ability to support the formation of a magnetic field within itself, while magnetic susceptibility is a measure of how easily a material can be magnetized. In some cases, the two properties may be equal, but they are not always equivalent.

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