Specific heat of an S = 1 quasi-1D bond alternating antiferromagnet in a magnetic field

Naoyuki Tateiwa; Masayuki Hagiwara; Hiroko Aruga-Katori; Tatsuo C. Kobayashi

doi:10.1016/S0921-4526(02)02130-0

Specific heat of an S = 1 quasi-1D bond alternating antiferromagnet in a magnetic field

Naoyuki Tateiwa, Masayuki Hagiwara, Hiroko Aruga-Katori, Tatsuo C. Kobayashi

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

13 Citations (Scopus)

Abstract

We report the results of specific heat measurements in a magnetic field on single crystal samples of the S = 1 quasi-1D bond alternating antiferromagnet Ni(C₉H₂₄N₄)NO₂(ClO₄). The compound has the singlet ground state with an excitation energy gap and the gap closes by application of magnetic field (H_c). We observed a sharp peak corresponding to the long-range ordering above H_c both parallel and perpendicular to the chain at low temperatures. The temperature-magnetic field phase diagram is discussed in comparison with those of the Haldane system Ni(C₅H₁₄N₂) ₂N₃(PF₆).

Original language	English
Pages (from-to)	1209-1210
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02130-0
Publication status	Published - May 2003
Externally published	Yes

Keywords

Bond alternating antiferromagnet
Long-range-ordering
Specific heat
Temperature-magnetic field phase diagram

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "We report the results of specific heat measurements in a magnetic field on single crystal samples of the S = 1 quasi-1D bond alternating antiferromagnet Ni(C9H24N4)NO2(ClO4). The compound has the singlet ground state with an excitation energy gap and the gap closes by application of magnetic field (Hc). We observed a sharp peak corresponding to the long-range ordering above Hc both parallel and perpendicular to the chain at low temperatures. The temperature-magnetic field phase diagram is discussed in comparison with those of the Haldane system Ni(C5H14N2) 2N3(PF6).",

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T1 - Specific heat of an S = 1 quasi-1D bond alternating antiferromagnet in a magnetic field

AU - Tateiwa, Naoyuki

AU - Hagiwara, Masayuki

AU - Aruga-Katori, Hiroko

AU - Kobayashi, Tatsuo C.

PY - 2003/5

Y1 - 2003/5

N2 - We report the results of specific heat measurements in a magnetic field on single crystal samples of the S = 1 quasi-1D bond alternating antiferromagnet Ni(C9H24N4)NO2(ClO4). The compound has the singlet ground state with an excitation energy gap and the gap closes by application of magnetic field (Hc). We observed a sharp peak corresponding to the long-range ordering above Hc both parallel and perpendicular to the chain at low temperatures. The temperature-magnetic field phase diagram is discussed in comparison with those of the Haldane system Ni(C5H14N2) 2N3(PF6).

AB - We report the results of specific heat measurements in a magnetic field on single crystal samples of the S = 1 quasi-1D bond alternating antiferromagnet Ni(C9H24N4)NO2(ClO4). The compound has the singlet ground state with an excitation energy gap and the gap closes by application of magnetic field (Hc). We observed a sharp peak corresponding to the long-range ordering above Hc both parallel and perpendicular to the chain at low temperatures. The temperature-magnetic field phase diagram is discussed in comparison with those of the Haldane system Ni(C5H14N2) 2N3(PF6).

KW - Bond alternating antiferromagnet

KW - Long-range-ordering

KW - Specific heat

KW - Temperature-magnetic field phase diagram

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