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Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography
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CoIr/Pt Multilayers Enabling Physical Unclonable Function via Domain Wall Motion.

Sabpreet Bhatti1, Subhakanta Das1, Badsha Sekh1

  • 1School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.

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|October 16, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a new CoIr/Pt material for spintronics devices, enabling lower energy consumption and improved security. This breakthrough facilitates the creation of smaller, more efficient physically unclonable function (PUF) devices for next-generation electronics.

Keywords:
CoIr/Pt heterostructuredomain wall motionhardware security primitivesphysically unclonable function (PUF)spintronics

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Spintronics devices offer high reliability and CMOS compatibility for advanced electronics.
  • Low energy operation is crucial for next-generation electronic devices.
  • Novel materials and device designs are needed to unlock spintronics potential.

Purpose of the Study:

  • To introduce a novel CoIr/Pt heterostructure for low-energy spintronic applications.
  • To demonstrate the utility of this heterostructure in physically unclonable function (PUF) devices.
  • To enhance hardware security primitives through advanced material design.

Main Methods:

  • Fabrication of CoIr/Pt heterostructures with negative magnetocrystalline anisotropy.
  • Characterization of perpendicular magnetization and low effective magnetic anisotropy energy.
  • Integration into spin-orbit torque-driven domain wall (DW) PUF devices.

Main Results:

  • Achieved perpendicular magnetization in CoIr/Pt by inverting anisotropy with Pt layers.
  • Demonstrated a five-fold reduction in switching current density compared to Co/Pt stacks.
  • Successfully implemented a 4 × 32-bit PUF device with unique outputs and simplified programming architecture, overcoming DW pinning challenges.

Conclusions:

  • The CoIr/Pt heterostructure enables low-energy, high-performance spintronic devices.
  • This material facilitates the development of robust and miniaturized PUF-based hardware security.
  • The findings offer a promising pathway for integrating advanced security primitives into electronic systems.