Pronounced 2/3 magnetization plateau in a frustrated $S$ = 1 isolated spin-triangle compound: Interplay between Heisenberg and biquadratic exchange interactions
Abstract
We report the synthesis and characterization of a new quantum magnet [2-[Bis(2-hydroxybenzyl)aminomethyl]pyridine]Ni(II)-trimer (BHAP-Ni3) in single-crystalline form. Our combined experimental and theoretical investigations reveal an exotic spin state that stabilizes a robust 2/3 magnetization plateau between 7 and 20 T in an external magnetic field. AC-susceptibility measurements show the absence of any magnetic order/glassy state down to 60 mK. The magnetic ground state is disordered and specific-heat measurements reveal the gapped nature of the spin excitations. Most interestingly, our theoretical modeling suggests that the 2/3 magnetization plateau emerges due to the interplay between antiferromagnetic Heisenberg and biquadratic exchange interactions within nearly isolated spin = 1 triangles.
Cite
@article{arxiv.1908.10807,
title = {Pronounced 2/3 magnetization plateau in a frustrated $S$ = 1 isolated spin-triangle compound: Interplay between Heisenberg and biquadratic exchange interactions},
author = {S. Chattopadhyay and B. Lenz and S. Kanungo and Sushila and S. K. Panda and S. Biermann and W. Schnelle and K. Manna and R. Kataria and M. Uhlarz and Y. Skourski and S. A. Zvyagin and A. Ponomaryov and T. Herrmannsdörfer and R. Patra and J. Wosnitza},
journal= {arXiv preprint arXiv:1908.10807},
year = {2019}
}