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Pronounced 23 magnetization plateau in a frustrated S=1 isolated spin-triangle compound: Interplay between Heisenberg and biquadratic exchange interactions

S. Chattopadhyay, B. Lenz, S. Kanungo, Sushila, S. K. Panda, S. Biermann, W. Schnelle, K. Manna, R. Kataria, M. Uhlarz, Y. Skourski, S. A. Zvyagin (+4 others)
2019 Physical review B  

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2019 pre-print arXiv:1908.10807v1 fatcat:z5fgrdgqwfahbmea6r4ixvshou
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
more » ... fic-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 S = 1 triangles.
doi:10.1103/physrevb.100.094427 fatcat:6cicha4mijazdefc6fdjxm2tzy
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S. Chattopadhyay, B. Lenz, S. Kanungo, Sushila, S. K. Panda, S. Biermann, W. Schnelle, K. Manna, R. Kataria, M. Uhlarz, Y. Skourski, S. A. Zvyagin, A. Ponomaryov, T. Herrmannsdörfer, R. Patra, J. Wosnitza. "Pronounced 23 magnetization plateau in a frustrated S=1 isolated spin-triangle compound: Interplay between Heisenberg and biquadratic exchange interactions." Physical review B 100.9 (2019)