High field ESR system and its application to the study of quantum spin systems

Hitoshi Ohta; Susumu Okubo; Shojiro Kimura; Tsuyoshi Tanaka; Hikomitsu Kikuchi; Hiroshi Nagasawa

doi:10.1023/A:1010785404344

High field ESR system and its application to the study of quantum spin systems

Hitoshi Ohta, Susumu Okubo, Shojiro Kimura, Tsuyoshi Tanaka, Hikomitsu Kikuchi, Hiroshi Nagasawa

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

1 Citation (Scopus)

Abstract

Developments of the high field ESR system in Kobe University is presented. Using Gunn oscillators and backward traveling oscillators (BWO), we can cover the frequency region from 30 to 1183.6 GHz with the use of InSb detector. Pulsed magnetic field up to 30 T is available and we are now trying to extend the field up to 40 T. Temperature range is from 1.8 to 300 K. Using this system, we studied S=1/2 ladder like system Cu₂(C₅H₁₂N₂)₂Cl ₄, and found a new magnetic transition at 10.1 T at 1.8 K. The temperature dependence of ESR in Cu₂(C₅H₁₂N₂)₂Cl ₄ shows g-shift below 8 K which corresponds to the maximum of the magnetic susceptibility. The g-shift below 8 K suggests the increase of the quantum fluctuation in the system, and the role of the quantum fluctuation in Cu₂(C₅H₁₂N₂)₂Cl ₄ is discussed.

Original language	English
Pages (from-to)	387-391
Number of pages	5
Journal	International Journal of Infrared and Millimeter Waves
Volume	22
Issue number	3
DOIs	https://doi.org/10.1023/A:1010785404344
Publication status	Published - 2001 Jan 1
Externally published	Yes

Keywords

Cu(CHN)Cl
High field ESR
Pulsed magnetic field
Spin ladder
g-shift

ASJC Scopus subject areas

Radiation
Atomic and Molecular Physics, and Optics
Instrumentation
Condensed Matter Physics
Physics and Astronomy (miscellaneous)
Electrical and Electronic Engineering

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title = "High field ESR system and its application to the study of quantum spin systems",

abstract = "Developments of the high field ESR system in Kobe University is presented. Using Gunn oscillators and backward traveling oscillators (BWO), we can cover the frequency region from 30 to 1183.6 GHz with the use of InSb detector. Pulsed magnetic field up to 30 T is available and we are now trying to extend the field up to 40 T. Temperature range is from 1.8 to 300 K. Using this system, we studied S=1/2 ladder like system Cu2(C5H12N2)2Cl 4, and found a new magnetic transition at 10.1 T at 1.8 K. The temperature dependence of ESR in Cu2(C5H12N2)2Cl 4 shows g-shift below 8 K which corresponds to the maximum of the magnetic susceptibility. The g-shift below 8 K suggests the increase of the quantum fluctuation in the system, and the role of the quantum fluctuation in Cu2(C5H12N2)2Cl 4 is discussed.",

keywords = "Cu(CHN)Cl, High field ESR, Pulsed magnetic field, Spin ladder, g-shift",

author = "Hitoshi Ohta and Susumu Okubo and Shojiro Kimura and Tsuyoshi Tanaka and Hikomitsu Kikuchi and Hiroshi Nagasawa",

year = "2001",

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doi = "10.1023/A:1010785404344",

language = "English",

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T1 - High field ESR system and its application to the study of quantum spin systems

AU - Ohta, Hitoshi

AU - Okubo, Susumu

AU - Kimura, Shojiro

AU - Tanaka, Tsuyoshi

AU - Kikuchi, Hikomitsu

AU - Nagasawa, Hiroshi

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Developments of the high field ESR system in Kobe University is presented. Using Gunn oscillators and backward traveling oscillators (BWO), we can cover the frequency region from 30 to 1183.6 GHz with the use of InSb detector. Pulsed magnetic field up to 30 T is available and we are now trying to extend the field up to 40 T. Temperature range is from 1.8 to 300 K. Using this system, we studied S=1/2 ladder like system Cu2(C5H12N2)2Cl 4, and found a new magnetic transition at 10.1 T at 1.8 K. The temperature dependence of ESR in Cu2(C5H12N2)2Cl 4 shows g-shift below 8 K which corresponds to the maximum of the magnetic susceptibility. The g-shift below 8 K suggests the increase of the quantum fluctuation in the system, and the role of the quantum fluctuation in Cu2(C5H12N2)2Cl 4 is discussed.

AB - Developments of the high field ESR system in Kobe University is presented. Using Gunn oscillators and backward traveling oscillators (BWO), we can cover the frequency region from 30 to 1183.6 GHz with the use of InSb detector. Pulsed magnetic field up to 30 T is available and we are now trying to extend the field up to 40 T. Temperature range is from 1.8 to 300 K. Using this system, we studied S=1/2 ladder like system Cu2(C5H12N2)2Cl 4, and found a new magnetic transition at 10.1 T at 1.8 K. The temperature dependence of ESR in Cu2(C5H12N2)2Cl 4 shows g-shift below 8 K which corresponds to the maximum of the magnetic susceptibility. The g-shift below 8 K suggests the increase of the quantum fluctuation in the system, and the role of the quantum fluctuation in Cu2(C5H12N2)2Cl 4 is discussed.

KW - Cu(CHN)Cl

KW - High field ESR

KW - Pulsed magnetic field

KW - Spin ladder

KW - g-shift

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JF - Journal of Infrared, Millimeter, and Terahertz Waves

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High field ESR system and its application to the study of quantum spin systems

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Keywords

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