Realization of two-dimensional ferromagnetism with giant coercivity in ultrathin βNi(OH)2 layers grown on a MoS2 surface

Shatabda Bhattacharya, Diptiman Dinda, Bikash Kumar Shaw, Saurav Dutta, and Shyamal K. Saha
Phys. Rev. B 93, 184403 – Published 4 May 2016

Abstract

Due to the charge transfer effect at the contact of transition metal (TM) and MoS2, the use of ferromagnets in MoS2 based spin transistor is not suitable. On the other hand, βNi(OH)2 is known to be a layered type material with antiparallel Ni spins in alternate layers. Here, an ultrathin layer of antiferromagnetic βNi(OH)2 is grown on the MoS2 surface to achieve complete ferromagnetism with giant coercivity (2925 Oe). The origin of this ferromagnetic ordering is the reduction of Ni spin moments in Ni(OH)2 layer adjacent to MoS2 surface due to charge transfer from S to Ni. The use of antiferromagnetic layered type material to achieve ferromagnetic ordering with giant coercivity is a new concept to realize perfect two-dimensional (2D) ferromagnets which have major advantages due to the huge change in coercivity with thickness.

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  • Received 28 October 2015
  • Revised 1 April 2016

DOI:https://doi.org/10.1103/PhysRevB.93.184403

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Shatabda Bhattacharya1, Diptiman Dinda1, Bikash Kumar Shaw1, Saurav Dutta2, and Shyamal K. Saha1,*

  • 1Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India
  • 2Department of Physics, Rammohan College, University of Calcutta, Kolkata-700009, India

  • *cnssks@iacs.res.in

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Issue

Vol. 93, Iss. 18 — 1 May 2016

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