TY - JOUR
T1 - Breakdown of an intermediate plateau in the magnetization process of anisotropic spin-1 Heisenberg dimer
T2 - Theory vs. experiment
AU - Strečka, J.
AU - Hagiwara, M.
AU - Baláž, P.
AU - Jaščur, M.
AU - Narumi, Y.
AU - Kimura, S.
AU - Kuchár, J.
AU - Kindo, K.
N1 - Funding Information:
J. Strečka would like to thank Japan Society for the Promotion of Science for the award of postdoctoral fellowship (ID No. PE07031) under which part of this work was carried out. This work was partially supported also by the Slovak Research and Development Agency under the contracts LPP-0107-06 and APVT 20-005204.
PY - 2008/9/1
Y1 - 2008/9/1
N2 - The magnetization process of the spin-1 Heisenberg dimer model with the uniaxial or biaxial single-ion anisotropy is particularly investigated in connection with recent experimental high-field measurements performed on the single-crystal sample of the homodinuclear nickel(II) compound [Ni2 (Medpt)2 (μ - ox) (H2 O)2] (ClO4)2 · 2 H2 O (Medpt=methyl-bis(3-aminopropyl)amine). The results obtained from the exact numerical diagonalization indicate a striking magnetization process with a marked spatial dependence on the applied magnetic field for arbitrary but finite single-ion anisotropy. It is demonstrated that the field range, which corresponds to an intermediate magnetization plateau emerging at a half of the saturation magnetization, basically depends on a single-ion anisotropy strength as well as a spatial orientation of the applied field. The breakdown of the intermediate magnetization plateau is discussed at length in relation to the single-ion anisotropy strength.
AB - The magnetization process of the spin-1 Heisenberg dimer model with the uniaxial or biaxial single-ion anisotropy is particularly investigated in connection with recent experimental high-field measurements performed on the single-crystal sample of the homodinuclear nickel(II) compound [Ni2 (Medpt)2 (μ - ox) (H2 O)2] (ClO4)2 · 2 H2 O (Medpt=methyl-bis(3-aminopropyl)amine). The results obtained from the exact numerical diagonalization indicate a striking magnetization process with a marked spatial dependence on the applied magnetic field for arbitrary but finite single-ion anisotropy. It is demonstrated that the field range, which corresponds to an intermediate magnetization plateau emerging at a half of the saturation magnetization, basically depends on a single-ion anisotropy strength as well as a spatial orientation of the applied field. The breakdown of the intermediate magnetization plateau is discussed at length in relation to the single-ion anisotropy strength.
KW - Exact diagonalization
KW - Heisenberg dimer
KW - Magnetization plateau
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U2 - 10.1016/j.physb.2008.03.025
DO - 10.1016/j.physb.2008.03.025
M3 - Article
AN - SCOPUS:48749100815
VL - 403
SP - 3146
EP - 3153
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 18
ER -