Field-Induced Long-Range Ordering in Haldane Gap System NDMAZ

Tatsuo C. Kobayashi; Hiroshi Tatewaki; Akihiro Koda; Kiichi Amaya; Yasuo Narumi; Koichi Kindo; Naoko Aizawa; Tomohiko Ishii; Masahiro Yamashita

doi:10.1143/JPSJ.70.813

Field-Induced Long-Range Ordering in Haldane Gap System NDMAZ

Tatsuo C. Kobayashi, Hiroshi Tatewaki, Akihiro Koda, Kiichi Amaya, Yasuo Narumi, Koichi Kindo, Naoko Aizawa, Tomohiko Ishii, Masahiro Yamashita

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Field-induced long-range ordering is investigated by heat capacity and high-field magnetization measurements in Haldane gap system Ni(C₅H₁₄N₂)₂N₃(ClO ₄) (NDMAZ). In the high-field magnetization measurement along the crystal c-axis, the differential magnetization is found to reveal the characteristic peak corresponding to the phase transition to the ordered state. The magnetization increases as (H - H_C)^0.6at the lowest temperature. The phase boundary determined down to 44mK by the peak of the differential magnetization obeys TN ∼ (H - H_C)^0.45. Anisotropic phase diagram is similar to that of Ni(C₅H₁₄N₂)₂N₃(PF ₆) (NDMAP).

Original language	English
Pages (from-to)	813-817
Number of pages	5
Journal	journal of the physical society of japan
Volume	70
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.70.813
Publication status	Published - Mar 1 2001
Externally published	Yes

Keywords

Haldane gap
Heat capacity
Long-range order
Magnetization

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.70.813

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title = "Field-Induced Long-Range Ordering in Haldane Gap System NDMAZ",

abstract = "Field-induced long-range ordering is investigated by heat capacity and high-field magnetization measurements in Haldane gap system Ni(C5H14N2)2N3(ClO 4) (NDMAZ). In the high-field magnetization measurement along the crystal c-axis, the differential magnetization is found to reveal the characteristic peak corresponding to the phase transition to the ordered state. The magnetization increases as (H - HC)0.6at the lowest temperature. The phase boundary determined down to 44mK by the peak of the differential magnetization obeys TN ∼ (H - HC)0.45. Anisotropic phase diagram is similar to that of Ni(C5H14N2)2N3(PF 6) (NDMAP).",

keywords = "Haldane gap, Heat capacity, Long-range order, Magnetization",

author = "Kobayashi, {Tatsuo C.} and Hiroshi Tatewaki and Akihiro Koda and Kiichi Amaya and Yasuo Narumi and Koichi Kindo and Naoko Aizawa and Tomohiko Ishii and Masahiro Yamashita",

year = "2001",

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doi = "10.1143/JPSJ.70.813",

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AU - Kobayashi, Tatsuo C.

AU - Tatewaki, Hiroshi

AU - Koda, Akihiro

AU - Amaya, Kiichi

AU - Narumi, Yasuo

AU - Kindo, Koichi

AU - Aizawa, Naoko

AU - Ishii, Tomohiko

AU - Yamashita, Masahiro

PY - 2001/3/1

Y1 - 2001/3/1

N2 - Field-induced long-range ordering is investigated by heat capacity and high-field magnetization measurements in Haldane gap system Ni(C5H14N2)2N3(ClO 4) (NDMAZ). In the high-field magnetization measurement along the crystal c-axis, the differential magnetization is found to reveal the characteristic peak corresponding to the phase transition to the ordered state. The magnetization increases as (H - HC)0.6at the lowest temperature. The phase boundary determined down to 44mK by the peak of the differential magnetization obeys TN ∼ (H - HC)0.45. Anisotropic phase diagram is similar to that of Ni(C5H14N2)2N3(PF 6) (NDMAP).

AB - Field-induced long-range ordering is investigated by heat capacity and high-field magnetization measurements in Haldane gap system Ni(C5H14N2)2N3(ClO 4) (NDMAZ). In the high-field magnetization measurement along the crystal c-axis, the differential magnetization is found to reveal the characteristic peak corresponding to the phase transition to the ordered state. The magnetization increases as (H - HC)0.6at the lowest temperature. The phase boundary determined down to 44mK by the peak of the differential magnetization obeys TN ∼ (H - HC)0.45. Anisotropic phase diagram is similar to that of Ni(C5H14N2)2N3(PF 6) (NDMAP).

KW - Haldane gap

KW - Heat capacity

KW - Long-range order

KW - Magnetization

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Field-Induced Long-Range Ordering in Haldane Gap System NDMAZ

Abstract

Keywords

ASJC Scopus subject areas

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