Magnetic transition and characteristics

Magnetic Transformation and Characteristics

Magnetism is an important physical property of materials, which involves strong interaction between elementary particles. Magnetic transformation is a change in the magnetic field of atomic particles in a material under certain conditions. Magnetic transformation is a physical phenomenon related to forces and fields, so it is often studied in concert with electromagnetic theory[1]. The magnetic transformation from the non-magnetic material to magnetic material is usually called the magnetic transition, which is the transition from non-magnetic behavior to magnetic behavior.

The main manifestation of magnetic transition is the change of magnetic properties, such as the change of magnetic induction, coercivity, magnetic anisotropy, magnetostriction, and domain formation, as well as the production of certain orientational order. Magnetic transition is an electronic transition phenomenon, which is related to the change of the energy level or spin structure of 3d transition elements or the coordination state of their atoms[2].

In general, the transition of magnetism can be basically divided into three categories, based on the degree of aggressiveness of the magnetism. The first is the spontaneous transition, which is the transition from a non-magnetic state to a magnetic state under the influence of external magnetic fields, such as spin reorientation transition. The second is the magnetic induction transition, which is the transition from non-magnetic state to magnetic state under the influence of external strong magnetic fields, such as the magnetite transition. The third is the magnetic anisotropic transition, which is a transition from a non-magnetic state to a magnetic state under the influence of an external magnetic field anisotropy. Generally, the transition from a non-magnetic state to a magnetic state can be induced not only by external magnetic fields, but also by internal chemical reactions, such as YBa2Cu3O7 transition, as well as external heat and cold.

In addition, it can be seen from the research achievements of the past few decades that the transition of magnetism is always accompanied by various physical properties, such as electric, optical, elastic and thermal properties, etc. From a thermodynamical point of view, changes in properties such as lattice structure, total spin energy, energy exchange, atomic volume, and temperature are important causes of magnetic transition[3].

In terms of the characteristics of magnetic transformation, it is generally considered that the transition temperature is affected by factors such as electron structure, spin-spin interaction, lattice microstructure, anisotropy energy, pressure and other physical and chemical properties of materials. Furthermore, the phenomena of magnetic transformation usually involve an intermediate stage in which the materials have low magnetism. The transition of magnetic material can also be suppressed by several external and internal factors, such as temperature, pressure, magnetic field and doping.

In conclusion, magnetic transformation is an important physical property of materials, and its characteristics are closely related to the electronic structure, spin-spin interaction and lattice microstructure of the material, as well as other physical and chemical factors of materials. It can be induced by external and internal factors such as strong magnetic fields, temperature, pressure and doping, and the temperature of transition is affected by various external and internal factors. In order to obtain more perfect magnetic transformation, it is necessary to study the influence of these factors on the transition effect.

References

[1] Yang, Jingang . Magnetic Properties of Materials . Beijng: China Machine Press, 2005.

[2] Dong, Tianxing. Magnetic Transformation and its Characteristics . Beijing: Central China Normal University Press, 2003.

[3] Tolpygo, Sergei Yu. Magnetism: Fundamentals, Materials, and Applications . Boca Raton: CRC Press, 2016.

Ferromagnetism is the strongest type of magnetic force that exists. It is a form of magnetic order which is responsible for most of the magnetic phenomena observed in materials such as iron and nickel. Ferromagnetism works by aligning all of the electron spins in the material in one direction, causing all of the atoms to become mini magnets. The magnetic force is so strong that it will cause the entire material to become magnetically polarized and act as a single large magnet.

Ferromagnetism can only occur at temperatures below a certain threshold known as the Curie temperature. This temperature is different for each material and depends upon the strength of the magnetic forces and the density of the material. Generally, the higher the density, the higher the Curie temperature. Above the Curie temperature, there is usually a rapid decrease in magnetism, until it disappears entirely.

When a ferromagnetic material is placed in a magnetic field, its electrons will become aligned with the field and it will become magnetized. The strength of magnetization depends upon the strength of the field and upon the temperature of the material. As the temperature increases, the strength of magnetization will decrease and it will eventually disappear completely.

Ferromagnetic materials can be used in a variety of ways. Magnets, loudspeakers, electrical motors and generators all use ferromagnetic materials in their construction. This is because of the strong magnetic force produced by ferromagnetic materials, making them particularly suitable for use with magnetic fields.

In summary, ferromagnetism is the strongest type of magnetic force. When a ferromagnetic material is placed in a magnetic field, its electrons will become aligned with the field and it will become magnetized. Above a certain temperature known as its Curie temperature, the materials magnetism will disappear altogether. Ferromagnetic materials are used widely in a variety of applications due to their strong magnetic force.