Two-dimensional Induced Ferromagnetism
M. K. Mukhopadhyay (1), M. K. Sanyal (1), M. D. Mukadam (2), S. M., Yusuf (2), J. K. Basu (3) ((1) Saha Institute of Nuclear Physics, India (2), Bhabha Atomic Research Centre, India (3) Argonne National Laboratory, USA)
TL;DR
This paper demonstrates that two-dimensional ferromagnetic order can be induced in gadolinium-based films using an in-plane magnetic field, revealing field-dependent exchange coupling and unique magnetic properties at the nanoscale.
Contribution
It introduces a method to induce and analyze two-dimensional ferromagnetism in nanometer-scale materials using Langmuir-Blodgett films and magnetic field application.
Findings
Induced ferromagnetism observed in 2D gadolinium films.
Field-dependent exchange coupling demonstrated.
Reduction in saturation field with decreasing temperature.
Abstract
Magnetic properties of materials confined to nanometer length scales are providing important information regarding low dimensional physics. Using gadolinium based Langmuir-Blodgett films, we demonstrate that two-dimensional ferromagnetic order can be induced by applying magnetic field along the in-plane (perpendicular to growth) direction. Field dependent exchange coupling is evident in the in-plane magnetization data that exhibit absence of hysteresis loop and show reduction in field required to obtain saturation in measured moment with decreasing temperature.
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