Multiferro fusion spintronics by ultimately controlled technique.

“多功能”是当前电气行业的关键词之一。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，我们可以有更小的计算机。为了创造新的多功能器件，开发材料的新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的新功能，以及在石榴石衬底上外延生长非石榴石薄膜。如今，稀土铁石榴石因其具有较大的费尔德常数和亚铁磁性而广为人知。由于铁石榴石在红外区具有较大的磁光性质，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，这种光隔离器可能会具有一种新的功能，比如通过施加电场来增强法拉第旋转角。

“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.