Magnetic Properties of a Quantum Ferrimagnet
We report the results of magnetic measurements on a powder sample of NiCu(pba)(D2O)3· 2D2O (pba=1, 3-propylenebis(oxamato)) which is one of the prototypical examples of an S=1/2 and 1 ferrimagneticchain. Susceptibility(χ) shows a monotonous increase with decreasing temperature (T) and reaches a maxi...
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| Published in: | Journal of the Physical Society of Japan Vol. 67; no. 7; p. 2209 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Tokyo
The Physical Society of Japan
01-07-1998
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| Online Access: | Get full text |
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| Summary: | We report the results of magnetic measurements on a powder sample of NiCu(pba)(D2O)3· 2D2O (pba=1, 3-propylenebis(oxamato)) which is one of the prototypical examples of an S=1/2 and 1 ferrimagneticchain. Susceptibility(χ) shows a monotonous increase with decreasing temperature (T) and reaches a maximum at about 7 K. In the plot of χ T versus \it{T}, the experimental data exhibit a broad minimum and are fit to the χ T curve calculated for the ferrimagneticHeisenberg chain composed of S=1/2 and 1. From this fit, we have evaluated the nearest-neighbor exchange constant J/kB=121 K, the g-values of Ni2+ and Cu2+, gNi=2.22 and gCu=2.09, respectively.Applied external field dependence of χ T at low temperatures is reproduced fairly well by the calculation for the same ferrimagnetic model. |
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| ISSN: | 0031-9015 1347-4073 |