Invention Grant
- Patent Title: Multilayered magnetic free layer structure containing an ordered magnetic alloy first magnetic free layer for spin-transfer torque (STT) MRAM
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Application No.: US17135219Application Date: 2020-12-28
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Publication No.: US11557628B2Publication Date: 2023-01-17
- Inventor: Daniel Worledge , Guohan Hu
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent Daniel P. Morris, Esq.
- Main IPC: H01L27/22
- IPC: H01L27/22 ; H01L43/08 ; H01L43/10 ; H01L43/12
Abstract:
A multilayered magnetic free layer structure is provided that includes a first magnetic free layer and a second magnetic free layer separated by a non-magnetic layer in which the first magnetic free layer is composed of an ordered magnetic alloy. The ordered magnetic alloy provides a first magnetic free layer that has low moment, but is strongly magnetic. The use of such an ordered magnetic alloy first magnetic free layer in a multilayered magnetic free layer structure substantially reduces the switching current needed to reorient the magnetization of the two magnetic free layers.
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