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Design of 2D Ferromagnets With High Exchange Bias in Fe‐MoS 2 Heterostructure For Spintronic Applications
Author(s) -
Bhattacharya Shatabda,
Saha Shyamal K.
Publication year - 2017
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201600183
Subject(s) - ferromagnetism , antiferromagnetism , spintronics , materials science , exchange bias , condensed matter physics , heterojunction , magnetic moment , hysteresis , magnetic hysteresis , spins , magnetization , nanotechnology , optoelectronics , magnetic field , magnetic anisotropy , physics , quantum mechanics
Fe‐MoS 2 heterostructures are synthesized in simple hydrothermal method. Different concentrations of Fe precursor are used to grow different thickness of Fe thin sheets placing MoS 2 as a template surface. Different characterization techniques are done to confirm the desired phases present in the samples. After that their magnetic characterization is carried out to measure its magnetic property. The hysteresis loop obtained is different from the conventional transition metal nanoparticles. Due to charge transfer from transition metal 3d orbital to 3p orbital of sulfur, the magnetic property of the as grown nanostructure is changed. Magnetic hysteresis loops reveal high amount of exchange bias which changes with temperature. At very low temperature ferromagnetic hysteresis loop is observed. With increasing temperature magnetic saturation dies away due to presence of antiferromagnetic interaction. This antiferromagnetic interaction comes due to charge transfer from Fe to MoS 2 . The transferred charges at MoS 2 surface creates an induced spin moment which is in antiferromagnetic coupling with the Fe spins.