The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2006
Filed:
Mar. 20, 2002
Yasujiro Taguchi, Tokyo, JP;
Yoshio Kaneko, Chiba, JP;
Yoshinori Tokura, Tokyo, JP;
Naoto Nagaosa, Tokyo, JP;
Yasujiro Taguchi, Tokyo, JP;
Yoshio Kaneko, Chiba, JP;
Yoshinori Tokura, Tokyo, JP;
Naoto Nagaosa, Tokyo, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Japan Science and Technology Agency, Saitama, JP;
Abstract
A magnetooptic element whose size is essentially that of a lattice, namely several angstroms in size of magnetic material and which at the same time has its exhibiting magnetooptic effect detectable is provided along with a magnetooptic disk, a memory device and a magnetooptical picture or image display with a storage capacity of several terabits per square inch or more, each using such a magnetooptic element. The magnetooptic element utilizes a gigantic effective magnetic filed based on a spin chirality formed by geometrically configuring the spin orientation and crystallographic structure of a certain solid material. The solid material exhibiting the spin chirality may be such as a pyrochlore type oxide compound whose chemical composition is represented by chemical formula: ABOwhere A is a rare-earth element and B is a transition metal, or a pyrochlore type oxide compound whose chemical composition is represented by chemical formula: (AC)BOwhere A is a rare-earth element, C is an alkali-earth metallic element and B is a transition metal and where 0<x<1.