COMPOSITE MATERIAL FOR POWER GENERATION AND ITS MANUFACTURING PROCESS

    公开(公告)号:US20240260473A1

    公开(公告)日:2024-08-01

    申请号:US18563437

    申请日:2022-06-30

    申请人: TOHOKU UNIVERSITY

    摘要: A composite material for power generation having high durability and relatively superior piezoelectric properties, and a method of manufacturing the composite material for power generation. The composite material for power generation has a plate-like shape having a predetermined thickness, and comprises a ceramic material having piezoelectricity and a polymer having piezoelectricity, and is configured so that the content rate of the ceramic material changes continuously and gradually along the thickness direction. It can be manufactured by laminating multiple types of piezoelectric thin films including a ceramic material having piezoelectricity and a polymer having piezoelectricity and having different content rates of the ceramic material so that the content rate of the ceramic material gradually changes along their thickness direction, and then performing heat treating.

    MAGNETORESISTIVE EFFECT ELEMENT, MAGNETIC MEMORY AND ARTIFICIAL INTELLIGENCE SYSTEM

    公开(公告)号:US20240244983A1

    公开(公告)日:2024-07-18

    申请号:US18282277

    申请日:2022-03-16

    申请人: TOHOKU UNIVERSITY

    IPC分类号: H10N50/10 H10B61/00 H10N50/85

    CPC分类号: H10N50/10 H10B61/00 H10N50/85

    摘要: Provided are a magnetoresistive element in which the magnetization direction in a recording layer can be efficiently reversed with low resistance and without reducing reversal efficiency by a write current flowing in a heavy-metal layer; a magnetic memory; and an artificial intelligence system. A magnetoresistive element 10 includes: a heavy-metal layer 11 formed by stacking an Ir layer(s) 12 and a Pt layer(s) 13; a recording layer 16 provided to be opposed to the heavy-metal layer 11, and formed to include a first ferromagnetic layer having a reversible magnetization; a reference layer 18 formed to include a second ferromagnetic layer in which the magnetization direction is fixed; and a barrier layer 17 sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and formed of an insulator. The magnetization direction in the first ferromagnetic layer is reversed by a write current supplied to the heavy-metal layer 11.