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Автор Тема: Пришло время раскрыть секрет поляризации ферритовых колец  (Прочитано 187 раз)
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« : 22 Ноября 2018, 15:46:10 »

Пришло время раскрыть секрет поляризации ферритовых колец

В теме http://bolshoyforum.com/forum/index.php?topic=594570.0 мы обсуждали феномен намагничивания ферромагнитных колец, который до настоящего времени не имеет своего физического объяснения. И я обещал, что как только будет опубликована моя статью по этому вопросу я представлю её аннотацию и дам на неё ссылку. Сегодня из редакции Global Journal я получил сообщение, что такая статья опубликована. Даю её название,  ссылку и аннотацию:
F. F. Mende. Macroscopic Crystallization of Magnetic Moments in the
Ferrite Rings

Forced macroscopic crystallization of magnetic moments in the ferrite rings

F. F. Mende


 Ferrite is soft-iron material and therefore it cannot be magnetized. However, the rings, made from ferrite, can be magnetized in the assigned direction. This special feature of the magnetization of such rings did not have, until now, of physical substantiation. In the article are examined the processes of the magnetization of the models of different configuration, including annular. It is shown that the magnetization of ferrite rings can be considered as the forced crystallization of magnetic moments.
Keywords: magnetic field, magnetic moment, ferromagnetic material, ferrite, magnetic bubble.

1. Introduction

       Soft-iron materials  these are the materials, which possess the properties  the ferromagnetic material  or  the ferrimagnet , moreover of them  the coercive force  by the induction comprises not more than 4 kA/m. Such materials also possess the high  by magnetic permeability  and by low losses on  hysteresis . In connection with the smallness of coercive force such materials cannot be magnetized and lose magnetization after the removal from them of magnetic field. 
       Soft-iron materials are used as  the cores   the transformers ,  electromagnets , in electric engines and in other cases, where it is necessary with the smallest expenditure of energy to reach the greatest  the induction . For decreasing the losses on  the eddy currents   in the transformers soft-iron materials with that increased are used  they are commonly used,  by resistivity in the form  magnetic circuits,  the assembled from separate isolated from each other thin sheets. Sheets are insulated by varnish from each other. This performance of core is called charged.
       The soft-iron materials include ferrites, which possess high specific resistance, and they can work at the high frequencies.
      However, from the above-indicated rule there are exception. It occurs that the rings, made from soft-iron materials, they can be magnetized, preserving in itself the magnetic induction, with which magnetic lines of force compose the annular circles, inserted in the material of ring. In this case depending on the prehistory of magnetization the direction of magnetic lines of force can be directed both to one and to other side.
      The idea of the memory unit in the form of ferrite core matrix for the first time arose in   1945  to the year  u  John Prespera Ekerta , its report widely circulated among the American computer specialists. In 1949  to the year  Van An  and  In Vo Vaydun  -  the young colleagues  Harvard University  Chinese origin- they invented  the shift register  on the magnetic cores (Van named it pulse  transfer  controlling  device) and the principle “record - readout- restoration”, which made it possible to use cores, whose process of readout destroys information. In October 1949 the year of Van it gave patent application, and was obtained it in 1955 the year  [1]. To the middle of the 1950 of past century the magnetic-core storage already received wide acceptance. Van gave to the law court to   IBM  ,  and   IBM   it was necessary to redeem patent in Van after  $500 000.
      Meanwhile,  Jay Forrester  in  Massachusetts Institute of Technology  it worked at the computer system   Whirlwind   (“Vortex”). In 1949 the year, just as Van, in Forrester arose the idea about the magnetic-core storage. According to the assertions of Forrester himself, it arrived at this solution independent of Van. In March 1950  the year  Forrester with his command developed the ferrite memory, which works according to the principle of the agreement of currents; the proposed by them diagram with four sensing wires - X,  Y,  prohibition - became conventional. In May 1951  the year  Forrester gave patent application, and was obtained it in 1956 the year  [2].

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