| 摘要 |
PURPOSE:To obtain a large Faraday effect and to improve storage stability by disposing a patterned nonmagnetic material as tracking into an optothermomagnetic medium consisting of an oxide material disposed on a substrate. CONSTITUTION:A nonmagnetic material 3 consisting of a high melting metal such as molybdenum (Mo), tantalum (Ta), tungsten (W), etc. is patterned as track guides on a substrate 11 consisting of gadolinium gallium garnet (Gd3Ga5 O12), neodymium gallium garnet (Nd3Ga5O12), magnesium oxide (MgO) or silicon dioxide (SiO2), etc. An optothermomagnetic medium 4 consisting of an oxide material such as gadolinium iron garnet (GdIG), yttrium iron garnet (YIG) and (Gd3-xBix)Fe5O12, (Y3-xBix)Fe5O12 in which gadolinium and yttrium are substd. with bismuth, etc. is disposed so as to embed the material 3. |
