THIN FILM MAGNET

• Main Authors: FUKUCHI EIICHIRO, TANAKA HIROBUMI, ITO MASASHI
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide a thin film magnet having a large maximum energy by suppressing decrease of coercive force, while having a large magnetization.SOLUTION: A thin film magnet is constituted of a first layer composed of Fe or an alloy of Fe and Co, a second layer composed of FeZ, and a third layer containing rear earth, formed on a substrate. Here, the Z in the second layer is Mo or Ta, the element ratio is 0.05<x<0.95, and the second layer is located between the first layer and third layer. The thin film magnet includes one or more first layer, one or more second layer and one or more third layer.SELECTED DRAWING: Figure 1 【課題】大きな磁化を持ちつつ、保磁力の低下を抑制することで大きな最大エネルギー積を有する薄膜磁石を提供する。【解決手段】基板上に形成された、Ｆｅ又はＦｅとＣｏの合金からなる第一の層とＦｅｘＺ１−ｘからなる第二の層と希土類を含む第三の層から構成される。ここで、第二の層のＺはＭｏ、又はＴａであり、元素比は０．０５＜ｘ＜０．９５であり、前記第一の層と前記第三の層の中間に位置する。一層以上の前記第一の層と一層以上の第二の層と一層以上の第三の層を含む。【選択図】図１