Ferromagnetic nature in low-dimensional S = 1 antiferromagnetic Li2Ni(WO4)2 nanoparticles
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
449
Pages
83-87
Date Issued
2018
Author(s)
Abstract
We report the magnetic behaviour of ball-milled nanoparticles of antiferromagnetic spin-1 Li2Ni(WO4)2 system by magnetic susceptibility and neutron diffraction measurements. Bulk sample shows indicators of two successive three dimensional (3D) antiferromagnetic (AF) ordering at TN1∼18K and TN2∼13K in χ(T). The magnetic susceptibility and neutron diffraction measurements indicate that no long-range magnetic order is detected when bulk sample is reduced to nano size particles, despite of the identical crystal structures. The super-super exchange interaction is proposed being disrupted as a result of cell volume expansion in nanoparticles. The Zero-Field-Cooled (ZFC) and Field-Cooled (FC) curve bifurcation and M(H) curve of nanoparticle reveal that the weak ferromagnetic behavior exists at low temperature because of spin disorder on the surface of nanoparticle.
Publisher
Elsevier B.V.
Type
journal article