Multiferro fusion spintronics by ultimately controlled technique.

“多功能化”是当今电气工业的关键词之一。如果我们有四态计算机存储器或具有晶体管功能的存储器，我们就可以拥有更小的计算机。为了创造新的多功能器件，在材料中开发新的功能是材料科学领域的最新趋势。我们开发了稀土铁石榴石薄膜和非石榴石薄膜在石榴石衬底上的外延生长的新功能。稀土铁石榴石由于具有较大的维代常数和铁磁性而被人们所熟知。由于铁石榴石在红外光区具有较大的磁光特性，因此被用作光隔离器。如果我们能够在稀土铁石榴石中开发出一种新的性质，那么光隔离器可能具有新的功能，例如通过施加电场来增强法拉第旋转。

“Multifunctionality” is one of the key words in recent electrical industry. If we have four-state computer memories or the memories with the function of transistor, we could have smaller computers. In order to create the new multifunctional devices, developing new functionality in materials is recent trend in material science field. We have developed new functionalities in rare earth iron garnet films and epitaxial growth of non-garnet films on garnet substrates. Nowadays, rare earth iron garnets are well known as the materials exhibit large Verdet constants and ferrimagnetism. Because of their large magneto-optical properties in infrared light region, iron garnets are utilized as optical isolators. If we could develop a new property in rare earth iron garnet, the optical isolators may have a new functionality such as enhancement of Faraday rotation with applying an electrical field.