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Title: Magnetization and spin gap in two-dimensional organic ferrimagnet BIPNNBNO
Authors: Ovchinnikov, A. S.
Sinitsyn, V. E.
Bostrem, I. G.
Hosokoshi, Y.
Inoue, K.
Issue Date: 2012
Citation: Magnetization and spin gap in two-dimensional organic ferrimagnet BIPNNBNO / A. S. Ovchinnikov, V. E. Sinitsyn, I. G. Bostrem, Y. Hosokoshi, K. Inoue // Journal of Physics Condensed Matter. — 2012. — Vol. 24. — № 30.
Abstract: A magnetization process in the two-dimensional ferrimagnet BIPNNBNO is analyzed. The compound consists of ferrimagnetic (1,1/2) chains coupled by two sorts of antiferromagnetic interaction. Whereas the behavior of the magnetization curve in higher magnetic fields can be understood within a process for the separate ferrimagnetic chain, the appearance of the singlet plateau at lower fields is an example of non-Lieb-Mattis type ferrimagnetism. By using the exact diagonalization technique for finite clusters of size 4×6, 4×8 and 4×10 we show that the interchain frustration coupling plays an essential role in stabilization of the singlet phase. These results are complemented by an analysis of four cylindrically coupled ferrimagnetic (1,1/2) chains via an Abelian bosonization technique and an effective theory based on the XXZ spin-1/2 Heisenberg model when the interchain interactions are sufficiently weak/strong, respectively. © 2012 IOP Publishing Ltd.
SCOPUS ID: 84863731224
WOS ID: 000306405600018
PURE ID: 1078200
ISSN: 0953-8984
DOI: 10.1088/0953-8984/24/30/306003
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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