Phenomenom of The Magnetic Instabiliti in Some Magnets with Collectivized Electrons

Özet

An effective method of studying the properties of zonal magnets is to affect the magnet by the - exchange field. The investigation of the impact of an - exchange field on the behavior of zonal metamagnetic was the objectives of this work. Gadolinium was used as a magnetizing element to exclude the effect of a crystal field. Therefore, in this work, the magnetic properties of the system were studied. The measurement results showed that, as is substituted for , the field decreases monotonically. The magnetization of the -subsystem exceeds that of the -subsystem , then the magnetic moment of the -subsystem is oriented parallel to the external field, while the moment of the -subsystem is antiparallel to the latter, here the exchange interaction leads to a decrease in the metamagnetic transition field. The exchange field helps the external field with magnetization. When , the magnetization of the -subsystem is oriented along the field. The external field does not magnetize the -subsystem, but demagnetizes it, and then to be magnetized parallel to this field. When these compounds become magnetically ordered, the magnetization degrees of - и -subsystems equalize in the concentration zone. The dependence of the magnetic moment of the compositions of the -subsystem on the content of gadoliniums increases linearly with the increasing content of gadolinium, which is due to the increasing effective field affecting the -subsystem. The data for the systems with different content of aluminum within an error are on the line.

Abstract

An effective method of studying the properties of zonal magnets is to affect the magnet by the 𝑓-𝑑 exchange field. The investigation of the impact of an 𝑓-𝑑 exchange field on the behavior of zonal metamagnetic 𝑌𝐶𝑜2 was the objectives of this work. Gadolinium was used as a magnetizing element to exclude the effect of a crystal field. Therefore, in this work, the magnetic properties of the system 𝑌1−𝑡𝐺𝑑𝑡(𝐶𝑜1−𝑥𝐴ℓ𝑥)2 were studied. The measurement results showed that, as 𝑌 is substituted for 𝐺𝑑, the field 𝐻𝑚 decreases monotonically. The magnetization of the 𝑑-subsystem exceeds that of the 𝑓-subsystem (𝑀𝑑>𝑡𝑀𝑓), then the magnetic moment of the 𝑑-subsystem is oriented parallel to the external field, while the moment of the 𝑓-subsystem is antiparallel to the latter, here the 𝑓−𝑑 exchange interaction leads to a decrease in the metamagnetic transition field. The exchange field 𝐻𝑓−𝑑 helps the external field with magnetization. When 𝑀𝑑<𝑡𝑀𝑓, the magnetization of the 𝑓-subsystem is oriented along the field. The external field does not magnetize the 𝑑-subsystem, but demagnetizes it, and then to be magnetized parallel to this field. When these compounds become magnetically ordered, the magnetization degrees of 𝑓- и 𝑑-subsystems equalize in the concentration zone. The dependence of the magnetic moment of the compositions of the 𝑑-subsystem on the content of gadoliniums increases linearly with the increasing content of gadolinium, which is due to the increasing effective field affecting the 𝑑-subsystem. The data for the systems with different content of aluminum within an error are on the line.

Anahtar kelimeler: Instability, Metamagnetizm, Magnetization, Exchange Interaction, Critical Field