日本磁気科学会 The Magneto-Science Society of Japan

 

 

  Magneto-Science Gallery Magnetic Levitation
No. Title Comment
１ Magnetic levitation of frog

(Top view)

 Experimental setup is shown here.
２ Magnetic levitation of water droplet

(Top view)

 Experimental setup is shown here.
３ Magnetic levitation of cherry tomato

(Top view)

 Experimental setup is shown here.
４ Sludgeworm in a magnetically levitated water droplet

(Side view)

 Experimental setup is shown here.
５ Magnetic levitation of plastic chips

(Side view)

Plastic chips (polyethylene and polystyrene, and polyethylene, polystyrene and nylon) in a cell (10mmx10mmx40mm) are levitated. Levitation heights of these plastic chips are different, indicating that one can separate them using a strong magnetic field.
cf. Y. Tanimoto, M. Fujiwara, M. Sueda, K. Inoue, and M. Akita, Jpn. J. Appl. Phys., 44, 6801 (2005).
  Magneto-Science Gallery Others
No. Title Comment
１ Magnetic field effect on the candle flame

(Side view)

A small candle is placed between a pair of magnetic poles on which iron triangle bars are pasted to increase the magnetic field gradient. The shape of the flame changes from normal-shape, trumpet-shape, doughnut-shape, to umbrella-shape, by changing the magnetic field intensity (<0.6 T) as well as by changing the flame position in the field.
２ Magnetic field effect on the anodic oxidation of KI

(Side view)

Pathways of anodic oxidation of KI are as follows:
 Anode:  2I－　→　I2 + 2e－,  I2+ I－　→　I3－　　　
Reddish-brown streams of I3－ moves straightly downward at zero field, because it is heavier than the electrolyte solution. The streams undergo turbulent motion very significantly, when this reaction is undertaken in the presence of a magnetic field (0.1-0.6 T).

cf.　I. Uechi, M. Fujiwara, Y. Fujiwara, Y. Yamamoto, and Y. Tanimoto, Bull. Chem. Soc. Jpn., 75, 2379 (2002).
３ Magnetic field effect on the silver dendrite formation

(Side view)

When a copper metal plate is dipped in a silver nitrate solution, silver dendrites grow on the surface of the plate.
Ag+   +  Cu (metal) →　Ag↓　+ Cu2+
The tops of the dendrites undergo precession, when this reaction is undertaken in the presence of a 15-T magnetic field,.

cf.   A.　Katsuki and Y. Tanimoto, Chem. Lett., 34, 726 (2005).

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