Publication Type
Journal
Journal Name
Physical Review Materials
Publication Date
Page Number
054404
Volume
1
Issue
5
Abstract
We use inelastic neutron scattering measurements to examine the inter-metallic Ising anti-ferromagnet \NNI.
The dynamical structure factor displays a spectrum with multiple crystal field excitations.
These crystal field excitations consist of a set of four transitions covering a range of energies between $4$ and $80$ meV. The analysis of the crystalline electric field scheme
confirms the Ising nature of the spins and their orientation as proposed by previous studies. We characterize \NNI~as a large moment intermetallic antiferromagnet with the potential to support a
geometrically frustrated Shastry-Sutherland lattice.
