scholarly journals Anhysteretic Permeability and Magnetic Shielding Effect of Steel Sheets for Magnetic Shield

2005 ◽  
Vol 125 (5) ◽  
pp. 466-470 ◽  
Author(s):  
Koichiro Fujita ◽  
Hideki Matsuoka ◽  
Tatsuhiko Hiratani ◽  
Kenji Tahara ◽  
Yasushi Tanaka
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding ◽  
Magnetic Shield ◽  
Steel Sheets

scholarly journals Significant enhancement of magnetic shielding effect by using the composite metamaterial composed of mu-near-zero media and ferrite

2021 ◽  
Vol 8 ◽  
pp. 13
Author(s):  
Xu Chen ◽  
Yuqian Wang ◽  
Zhiwei Guo ◽  
Xian Wu ◽  
Fengqing Yang ◽  
...  
Keyword(s):  
Small Area ◽  
Near Field ◽  
Experimental Results ◽  
Shielding Effect ◽  
Magnetic Shielding ◽  
Shielding Effectiveness ◽  
Large Area ◽  
Magnetic Shield ◽  
Field Control ◽  
Ferrite Slab

The magnetic shield plays an important role in magnetic near-field control. However, the requirements of efficiency, ultra thinness, lightness and cheapness are still the challenges. Here, we firstly propose a composite metamaterial in which the mu-near-zero media is covered with a ferrite slab. We verify that this structure can enhance the shielding effectiveness (SE) in a small area. Furthermore, we optimize the magnetic path by changing the bulk ferrite slab into a patterned slab. In this way, significant SE enhancement can be achieved in a large area. Experimental results show that the maximum SE of the composite metamaterial with a patterned ferrite is 20.56 dB, which is nearly 19 dB higher than that of a single ferrite slab with the same thickness of the composite metamaterial. The results on the composite metamaterial would be very useful in the applications involving magnetic shielding.

Magnetic Shielding Effect of Bi Oxide Superconducting Vessels with a SQUID

1991 ◽  
pp. 591-594 ◽  
Author(s):  
Atsushi Koike ◽  
Kazutomo Hoshino ◽  
Hiroshi Ohta ◽  
Eichi Sudoh ◽  
Koichi Numata ◽  
...  
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding

Melt Growth of YBaCuO and Magnetic Shielding Effect

1996 ◽  
pp. 763-766
Author(s):  
Hiroyuki Fujimoto ◽  
Takumi Ban ◽  
Kenji Kawano ◽  
Kaoru Ohno ◽  
Masahiro Kojima ◽  
...  
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding ◽  
Melt Growth

Magnetic Shielding Effect of YBCO Prepared by Modified Melt Texture Growth (MMTG) Method

1993 ◽  
pp. 795-798 ◽  
Author(s):  
Shuichi Kohayashi ◽  
Yuuichi Ishikawa ◽  
Shuji Yoshizawa ◽  
Hironao Kojima
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding ◽  
Melt Texture

Magnetic Shielding Effect of High-Tc Superconducting Plate

1998 ◽  
pp. 949-952
Author(s):  
M. Kojima ◽  
S. Haseyama ◽  
M. Satoh ◽  
T. Sekikawa ◽  
H. Fujimoto ◽  
...  
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding ◽  
High Tc

Anomalous local magnetic shielding effect at muon site in Sr2.5Ca11.5Cu24O41 and Ce0.99Cu2.02Si2

2000 ◽  
Vol 289-290 ◽  
pp. 322-325 ◽  
Author(s):  
R Kadono ◽  
A Koda ◽  
W Higemoto ◽  
K Ohishi ◽  
K Kakuta ◽  
...  
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding ◽  
Muon Site

scholarly journals On residual magnetism in relation to magnetic shielding

1917 ◽  
Vol 93 (653) ◽  
pp. 393-412
Keyword(s):  
Internal Field ◽  
Magnetic Shielding ◽  
Careful Study ◽  
Present Communication ◽  
Magnetic Shield ◽  
Spherical Shells ◽  
The Earth ◽  
Order Of Magnitude ◽  
Usual Process ◽  
Residual Magnetism

The present communication records the final stages of an investigation, of a somewhat exhaustive character, into the various problems which were presented by the necessity for constructing a magnetic shield suitable for large spaces, and capable of giving such a degree of shielding that the internal field caused by the earth should not exceed the order of magnitude 10 -3 C. G. S. unit. The theoretical calculation of the best form of shield, and the details of its construction, were given, together with an examination of the various methods of testing the efficiencies of large shields, in the first paper. A study of the effect of leakage through small air spaces was made at the same time, and it became apparent that not only this problem, but several others which are vital to the production of the theoretical efficiency of a shield, needed a more careful study than they had received hitherto. The usual process adopted for removing permanent magnetism from a shell or set of shells, by the reversals of a slowly decreasing current, ceases to be efficient when the magnetisation is very small, unless special methods are introduced, and there was previously no definite indication of the degree of accuracy with which the magnetic induction at any point due to a coil, wound in a helix on one member of a set of spherical shells, could be either predicted or measured. A study of these problems was made, and the results described in a second paper.

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