Observation of direct transitions in the ferromagnetic and antiferromagnetic dimer system (CH 3) 2NH 2CuCl 3 by high-field ESR

Makoto Yoshida; Yumiko Kitano; Yuji Inagaki; Takahiro Sakurai; Motoi Kimata; Susumu Okubo; Hitoshi Ohta; Keiichi Koyama; Mitsuhiro Motokawa; Takayuki Asano; Yoshitami Ajiro

doi:10.1143/JPSJ.76.113704

Observation of direct transitions in the ferromagnetic and antiferromagnetic dimer system (CH ₃) ₂NH ₂CuCl ₃ by high-field ESR

Makoto Yoshida, Yumiko Kitano, Yuji Inagaki, Takahiro Sakurai, Motoi Kimata, Susumu Okubo, Hitoshi Ohta, Keiichi Koyama, Mitsuhiro Motokawa, Takayuki Asano, Yoshitami Ajiro

研究成果: Article › 査読

5 被引用数 (Scopus)

抄録

High-field electron spin resonance (ESR) measurements of single crystals of (CH ₃) ₂NH ₂CuCl ₃ (DMACuCl ₃) have been performed in the frequency range of 50 to 550 GHz in the paramagnetic region. In addition to the electron paramagnetic resonance, we have observed four ESR modes ω ₁, ω ₂, ω ₃, and ω ₄. The modes ω ₂ and ω ₃ have a frequency gap of 325 GHz (15.6 K), while the mode ω ₁ has a gap of 420 GHz (20 K) at 0 T. The modes ω ₂ and ω ₃ are attributed to the transitions between the singlet and the triplet of the antiferromagnetic (AF) dimer. We found that the large spin-gap for the AF dimer still remains at the critical field B _c2 = 3.5 T determined by magnetization and specific heat measurements.

本文言語	English
論文番号	113704
ジャーナル	journal of the physical society of japan
巻	76
号	11
DOI	https://doi.org/10.1143/JPSJ.76.113704
出版ステータス	Published - 2007 11月 1
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（全般）

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10.1143/JPSJ.76.113704

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引用スタイル

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title = "Observation of direct transitions in the ferromagnetic and antiferromagnetic dimer system (CH 3) 2NH 2CuCl 3 by high-field ESR",

abstract = "High-field electron spin resonance (ESR) measurements of single crystals of (CH 3) 2NH 2CuCl 3 (DMACuCl 3) have been performed in the frequency range of 50 to 550 GHz in the paramagnetic region. In addition to the electron paramagnetic resonance, we have observed four ESR modes ω 1, ω 2, ω 3, and ω 4. The modes ω 2 and ω 3 have a frequency gap of 325 GHz (15.6 K), while the mode ω 1 has a gap of 420 GHz (20 K) at 0 T. The modes ω 2 and ω 3 are attributed to the transitions between the singlet and the triplet of the antiferromagnetic (AF) dimer. We found that the large spin-gap for the AF dimer still remains at the critical field B c2 = 3.5 T determined by magnetization and specific heat measurements.",

keywords = "(CH ) NH CuCl, Bond alternating chain, Dimer system, Direct transition, ESR",

author = "Makoto Yoshida and Yumiko Kitano and Yuji Inagaki and Takahiro Sakurai and Motoi Kimata and Susumu Okubo and Hitoshi Ohta and Keiichi Koyama and Mitsuhiro Motokawa and Takayuki Asano and Yoshitami Ajiro",

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doi = "10.1143/JPSJ.76.113704",

language = "English",

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journal = "Journal of the Physical Society of Japan",

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T1 - Observation of direct transitions in the ferromagnetic and antiferromagnetic dimer system (CH 3) 2NH 2CuCl 3 by high-field ESR

AU - Yoshida, Makoto

AU - Kitano, Yumiko

AU - Inagaki, Yuji

AU - Sakurai, Takahiro

AU - Kimata, Motoi

AU - Okubo, Susumu

AU - Ohta, Hitoshi

AU - Koyama, Keiichi

AU - Motokawa, Mitsuhiro

AU - Asano, Takayuki

AU - Ajiro, Yoshitami

PY - 2007/11/1

Y1 - 2007/11/1

N2 - High-field electron spin resonance (ESR) measurements of single crystals of (CH 3) 2NH 2CuCl 3 (DMACuCl 3) have been performed in the frequency range of 50 to 550 GHz in the paramagnetic region. In addition to the electron paramagnetic resonance, we have observed four ESR modes ω 1, ω 2, ω 3, and ω 4. The modes ω 2 and ω 3 have a frequency gap of 325 GHz (15.6 K), while the mode ω 1 has a gap of 420 GHz (20 K) at 0 T. The modes ω 2 and ω 3 are attributed to the transitions between the singlet and the triplet of the antiferromagnetic (AF) dimer. We found that the large spin-gap for the AF dimer still remains at the critical field B c2 = 3.5 T determined by magnetization and specific heat measurements.

AB - High-field electron spin resonance (ESR) measurements of single crystals of (CH 3) 2NH 2CuCl 3 (DMACuCl 3) have been performed in the frequency range of 50 to 550 GHz in the paramagnetic region. In addition to the electron paramagnetic resonance, we have observed four ESR modes ω 1, ω 2, ω 3, and ω 4. The modes ω 2 and ω 3 have a frequency gap of 325 GHz (15.6 K), while the mode ω 1 has a gap of 420 GHz (20 K) at 0 T. The modes ω 2 and ω 3 are attributed to the transitions between the singlet and the triplet of the antiferromagnetic (AF) dimer. We found that the large spin-gap for the AF dimer still remains at the critical field B c2 = 3.5 T determined by magnetization and specific heat measurements.

KW - (CH ) NH CuCl

KW - Bond alternating chain

KW - Dimer system

KW - Direct transition

KW - ESR

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