Antiferroquadrupolar ordering and magnetic properties of the tetragonal DyB2C2 compound

Hiroki Yamauchi; Hideya Onodera; Kenji Ohoyama; Takahiro Onimaru; Masashi Kosaka; Masayoshi Ohashi; Yasuo Yamaguchi

doi:10.1143/JPSJ.68.2057

Antiferroquadrupolar ordering and magnetic properties of the tetragonal DyB₂C₂ compound

Hiroki Yamauchi, Hideya Onodera, Kenji Ohoyama, Takahiro Onimaru, Masashi Kosaka, Masayoshi Ohashi, Yasuo Yamaguchi

Institute for Materials Research (IMR)

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

162 Citations (Scopus)

Abstract

Magnetic properties were investigated on a single-crystalline DyB₂C₂ compound with the tetragonal structure. Spontaneous magnetizations appear along the a- and [1 1 0]-directions below T_C = 15.3 K. A very small shoulder is observed only along the c-axis at T_Q = 24.7 K, although large λ-type anomalous specific heats are observed at T_C and T_Q. There exists a large magnetic anisotropy in the tetragonal basal plane which is observed in magnetization processes below T_C. Neutron powder diffraction experiments reveal that magnetic reflections are observed only below T_C. In the magnetically ordered phase, the Dy moments are arranged to be perpendicular to neighbors along the c-axis. The results are well interpreted by postulating that the phase between T_C and T_Q is an antiferroquadrupolar ordered one. DyB₂C₂ is a novel compound with a high antiferroquadrupolar ordering temperature of 24.7 K.

Original language	English
Pages (from-to)	2057-2066
Number of pages	10
Journal	journal of the physical society of japan
Volume	68
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.68.2057
Publication status	Published - 1999 Jan 1

Keywords

Antiferroquadrupolar ordering
DyBC
Magnetic anisotropy
Magnetic phase diagram
Magnetization
Neutron diffraction
Specific heat

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.68.2057

Cite this

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title = "Antiferroquadrupolar ordering and magnetic properties of the tetragonal DyB2C2 compound",

abstract = "Magnetic properties were investigated on a single-crystalline DyB2C2 compound with the tetragonal structure. Spontaneous magnetizations appear along the a- and [1 1 0]-directions below TC = 15.3 K. A very small shoulder is observed only along the c-axis at TQ = 24.7 K, although large λ-type anomalous specific heats are observed at TC and TQ. There exists a large magnetic anisotropy in the tetragonal basal plane which is observed in magnetization processes below TC. Neutron powder diffraction experiments reveal that magnetic reflections are observed only below TC. In the magnetically ordered phase, the Dy moments are arranged to be perpendicular to neighbors along the c-axis. The results are well interpreted by postulating that the phase between TC and TQ is an antiferroquadrupolar ordered one. DyB2C2 is a novel compound with a high antiferroquadrupolar ordering temperature of 24.7 K.",

keywords = "Antiferroquadrupolar ordering, DyBC, Magnetic anisotropy, Magnetic phase diagram, Magnetization, Neutron diffraction, Specific heat",

author = "Hiroki Yamauchi and Hideya Onodera and Kenji Ohoyama and Takahiro Onimaru and Masashi Kosaka and Masayoshi Ohashi and Yasuo Yamaguchi",

year = "1999",

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language = "English",

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T1 - Antiferroquadrupolar ordering and magnetic properties of the tetragonal DyB2C2 compound

AU - Yamauchi, Hiroki

AU - Onodera, Hideya

AU - Ohoyama, Kenji

AU - Onimaru, Takahiro

AU - Kosaka, Masashi

AU - Ohashi, Masayoshi

AU - Yamaguchi, Yasuo

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Magnetic properties were investigated on a single-crystalline DyB2C2 compound with the tetragonal structure. Spontaneous magnetizations appear along the a- and [1 1 0]-directions below TC = 15.3 K. A very small shoulder is observed only along the c-axis at TQ = 24.7 K, although large λ-type anomalous specific heats are observed at TC and TQ. There exists a large magnetic anisotropy in the tetragonal basal plane which is observed in magnetization processes below TC. Neutron powder diffraction experiments reveal that magnetic reflections are observed only below TC. In the magnetically ordered phase, the Dy moments are arranged to be perpendicular to neighbors along the c-axis. The results are well interpreted by postulating that the phase between TC and TQ is an antiferroquadrupolar ordered one. DyB2C2 is a novel compound with a high antiferroquadrupolar ordering temperature of 24.7 K.

AB - Magnetic properties were investigated on a single-crystalline DyB2C2 compound with the tetragonal structure. Spontaneous magnetizations appear along the a- and [1 1 0]-directions below TC = 15.3 K. A very small shoulder is observed only along the c-axis at TQ = 24.7 K, although large λ-type anomalous specific heats are observed at TC and TQ. There exists a large magnetic anisotropy in the tetragonal basal plane which is observed in magnetization processes below TC. Neutron powder diffraction experiments reveal that magnetic reflections are observed only below TC. In the magnetically ordered phase, the Dy moments are arranged to be perpendicular to neighbors along the c-axis. The results are well interpreted by postulating that the phase between TC and TQ is an antiferroquadrupolar ordered one. DyB2C2 is a novel compound with a high antiferroquadrupolar ordering temperature of 24.7 K.

KW - Antiferroquadrupolar ordering

KW - DyBC

KW - Magnetic anisotropy

KW - Magnetic phase diagram

KW - Magnetization

KW - Neutron diffraction

KW - Specific heat

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