ESR measurements of GdBi

K. Koyama; T. Tomimatsu; M. Yoshida; D. X. Li; M. Motokawa

doi:10.1016/j.physb.2004.01.040

ESR measurements of GdBi

K. Koyama, T. Tomimatsu, M. Yoshida, D. X. Li, M. Motokawa

IMR - Materials Processing and Characterization Division

Tohoku University

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Electron spin resonance (ESR) measurements on a single crystal of GdBi have been performed using a vector network analyzer (VNA) in the frequency range between 57 and 107 GHz, in the temperature range from 50 to 1.7 K and in magnetic fields up to 14 T using a superconducting magnet to obtain the microscopic information about the basic magnetic properties. Above 15 K, the observed absorption corresponds to g = 2.0 of Gd³⁺. However, the resonance field shifts to lower field with decreasing temperature from 4.2 K, which cannot be explained by "usual" antiferromagnetic resonance (AFMR) modes but suggests that the hyperfine field due to the Bi nuclear moments affects the AFMR of GdBi. The estimated values of the anisotropy field and the hyperfine anisotropy field are B_a = 5.6 × 10^-4 T and B_n = 7.9 ×10^-3 T, respectively, at 4.2 K.

Original language	English
Pages (from-to)	155-159
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	346-347
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physb.2004.01.040
Publication status	Published - 2004 Apr 30
Event	Proceedings of the 7th International Symposium on Research - Toulouse, France Duration: 2003 Jul 20 → 2003 Jul 23

Keywords

Antiferromagnetic resonance
Electron spin resonance
Hyperfine interaction

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10.1016/j.physb.2004.01.040

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@article{ca62d3019d2b462689b4e5de81c2eb83,

title = "ESR measurements of GdBi",

abstract = "Electron spin resonance (ESR) measurements on a single crystal of GdBi have been performed using a vector network analyzer (VNA) in the frequency range between 57 and 107 GHz, in the temperature range from 50 to 1.7 K and in magnetic fields up to 14 T using a superconducting magnet to obtain the microscopic information about the basic magnetic properties. Above 15 K, the observed absorption corresponds to g = 2.0 of Gd3+. However, the resonance field shifts to lower field with decreasing temperature from 4.2 K, which cannot be explained by {"}usual{"} antiferromagnetic resonance (AFMR) modes but suggests that the hyperfine field due to the Bi nuclear moments affects the AFMR of GdBi. The estimated values of the anisotropy field and the hyperfine anisotropy field are Ba = 5.6 × 10-4 T and Bn = 7.9 ×10-3 T, respectively, at 4.2 K.",

keywords = "Antiferromagnetic resonance, Electron spin resonance, Hyperfine interaction",

author = "K. Koyama and T. Tomimatsu and M. Yoshida and Li, {D. X.} and M. Motokawa",

year = "2004",

month = apr,

day = "30",

doi = "10.1016/j.physb.2004.01.040",

language = "English",

volume = "346-347",

pages = "155--159",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "1-4",

note = "Proceedings of the 7th International Symposium on Research ; Conference date: 20-07-2003 Through 23-07-2003",

}

TY - JOUR

T1 - ESR measurements of GdBi

AU - Koyama, K.

AU - Tomimatsu, T.

AU - Yoshida, M.

AU - Li, D. X.

AU - Motokawa, M.

PY - 2004/4/30

Y1 - 2004/4/30

N2 - Electron spin resonance (ESR) measurements on a single crystal of GdBi have been performed using a vector network analyzer (VNA) in the frequency range between 57 and 107 GHz, in the temperature range from 50 to 1.7 K and in magnetic fields up to 14 T using a superconducting magnet to obtain the microscopic information about the basic magnetic properties. Above 15 K, the observed absorption corresponds to g = 2.0 of Gd3+. However, the resonance field shifts to lower field with decreasing temperature from 4.2 K, which cannot be explained by "usual" antiferromagnetic resonance (AFMR) modes but suggests that the hyperfine field due to the Bi nuclear moments affects the AFMR of GdBi. The estimated values of the anisotropy field and the hyperfine anisotropy field are Ba = 5.6 × 10-4 T and Bn = 7.9 ×10-3 T, respectively, at 4.2 K.

AB - Electron spin resonance (ESR) measurements on a single crystal of GdBi have been performed using a vector network analyzer (VNA) in the frequency range between 57 and 107 GHz, in the temperature range from 50 to 1.7 K and in magnetic fields up to 14 T using a superconducting magnet to obtain the microscopic information about the basic magnetic properties. Above 15 K, the observed absorption corresponds to g = 2.0 of Gd3+. However, the resonance field shifts to lower field with decreasing temperature from 4.2 K, which cannot be explained by "usual" antiferromagnetic resonance (AFMR) modes but suggests that the hyperfine field due to the Bi nuclear moments affects the AFMR of GdBi. The estimated values of the anisotropy field and the hyperfine anisotropy field are Ba = 5.6 × 10-4 T and Bn = 7.9 ×10-3 T, respectively, at 4.2 K.

KW - Antiferromagnetic resonance

KW - Electron spin resonance

KW - Hyperfine interaction

UR - http://www.scopus.com/inward/record.url?scp=2042546749&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2042546749&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2004.01.040

DO - 10.1016/j.physb.2004.01.040

M3 - Conference article

AN - SCOPUS:2042546749

SN - 0921-4526

VL - 346-347

SP - 155

EP - 159

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-4

T2 - Proceedings of the 7th International Symposium on Research

Y2 - 20 July 2003 through 23 July 2003

ER -

ESR measurements of GdBi

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Keywords

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