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Title: Electrically Controlled All‐Antiferromagnetic Tunnel Junctions on Silicon with Large Room‐Temperature Magnetoresistance

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [4];  [5];  [5];  [1];  [1];  [1];  [6];  [6];  [7];  [6];  [2];  [5];  [8];  [9]; ORCiD logo [2]
  1. Department of Electrical and Computer Engineering Northwestern University Evanston IL 60208 USA
  2. Department of Electrical and Computer Engineering Northwestern University Evanston IL 60208 USA, Applied Physics Program Northwestern University Evanston IL 60208 USA
  3. Department of Electrical and Computer Engineering Northwestern University Evanston IL 60208 USA, Institute of Advanced Materials (INAM) Universitat Jaume I Castellón 12006 Spain
  4. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
  5. Department of Physics and Astronomy California State University Northridge Northridge CA 91330 USA
  6. Materials Science Division Argonne National Laboratory Lemont IL 60439 USA
  7. Department of Electrical and Information Engineering Politecnico di Bari Bari 70125 Italy
  8. Department of Mathematical and Computer Sciences Physical Sciences and Earth Sciences University of Messina Messina 98166 Italy
  9. Department of Electrical and Computer Engineering Northwestern University Evanston IL 60208 USA, Applied Physics Program Northwestern University Evanston IL 60208 USA, Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA, Department of Chemistry Northwestern University Evanston IL 60208 USA

Abstract Antiferromagnetic (AFM) materials are a pathway to spintronic memory and computing devices with unprecedented speed, energy efficiency, and bit density. Realizing this potential requires AFM devices with simultaneous electrical writing and reading of information, which are also compatible with established silicon‐based manufacturing. Recent experiments have shown tunneling magnetoresistance (TMR) readout in epitaxial AFM tunnel junctions. However, these TMR structures are not grown using a silicon‐compatible deposition process, and controlling their AFM order required external magnetic fields. Here are shown three‐terminal AFM tunnel junctions based on the noncollinear antiferromagnet PtMn 3 , sputter‐deposited on silicon. The devices simultaneously exhibit electrical switching using electric currents, and electrical readout by a large room‐temperature TMR effect. First‐principles calculations explain the TMR in terms of the momentum‐resolved spin‐dependent tunneling conduction in tunnel junctions with noncollinear AFM electrodes.

Sponsoring Organization:
USDOE
OSTI ID:
2325090
Journal Information:
Advanced Materials, Journal Name: Advanced Materials; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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