IV-U-2 Inducing a Magnetic Ordering in the Haldane Material Ni(C₅H₁₄N₂)₂N₃(ClO₄) by Magnetic Field

Zentaro HONDA, Koichi KATSUMATA (RIKEN), Tachi OHISHI, Toshio MANABE (Nagoya Univ.) and Masahiro YAMASHITA (Nagoya Univ. and IMS)

[J. Phys. Condens. Matter 9, L83 (1997)]

From a heat capacity measurement in high magnetic fields and low temperatures, we have obtained evidence for a magnetic ordering in the S =1 quasi-one dimensional Heisenberg antiferromagnet Ni(C₅H₁₄N₂)₂N₃(ClO₄). The transition temperature is ~0.6 K at 12 T parallel to the chain axis.

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