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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials with room-temperature magnetism are crucial for spintronic devices.
  • Combining semiconducting properties with magnetism is a key challenge in developing next-generation electronics.

Purpose of the Study:

  • To investigate the room-temperature magnetic properties of the 1T phase of molybdenum disulfide (MoS2).
  • To explore the relationship between structural properties and magnetic coercivity in 2D MoS2.

Main Methods:

  • Single-step hydrothermal synthesis was employed to prepare MoS2 nanosheets.
  • Structural analysis, including X-ray diffraction, was used to determine phase fraction and lattice parameters.
  • Magnetic properties, such as coercivity and saturation magnetization, were measured at room temperature.

Main Results:

  • Ferromagnetism was observed in 1T-phase MoS2 at room temperature, with a coercivity of approximately 0.3 T.
  • The synthesized MoS2 exhibited a relative 1T-phase content up to 77%.
  • Lattice expansion and increased interplanar spacing were correlated with higher 1T-phase fraction and enhanced coercivity.

Conclusions:

  • The study demonstrates a record high coercivity for 2D magnets at room temperature.
  • Phase and strain engineering in MoS2 provide a direct structural pathway to control magnetic coercivity.
  • This work presents a scalable platform for developing phase-engineered magnetism in layered materials for spintronics.