KOSUGA, Kosuke

OGAWA, Isamu

小川, 勇

小菅, 幸介

University of Fukui Repository

112 113
㟁Ꮚࢫࣆࣥඹ㬆ἲࢆ⏝࠸ࡓ☢ሙᙉᗘ ᐃ㻌
Measurement of Magnetic Field Intensity  
by Using Electron-Spin Resonance 
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ᑠⳢᖾ௓㸪ᑠᕝ ຬ
Kosuke Kosuga, Isamu Ogawa 

⚟஭኱Ꮫ㐲㉥እ㡿ᇦ㛤Ⓨ◊✲ࢭࣥࢱ࣮

Research Center for Development of Far-Infrared Region, University of Fukui, 
 Fukui 910-8507, Japan 

Abstract
 Accurate measurement of magnetic field intensity produced by super conducting 
magnet is important for Gyrotron operation. Usually the value calculated from coil 
current and winding date is used. However, the calculated value may be deviated from 
the measurement value because of the effects from magnetic material or hysteresis of 
super conducting coils. There are several measurement methods. Gauss meter using a 
hall element is the most common way. However its accuracy is restricted to several %. 
We have carried out measurment of the magnetic field intensity by using Electron Spin 
Resonance (ESR) spectroscopy for DPPH powder sample. We have fabricated XYZ 
stage for measurement of the field distribution. The measrement system was applied for 
a 15 T L-He free superconducting magnet. As a result, we can maeasure the magnetic 
field intensy with significant figures over than 5. 
研究報告１１
114 115
㸯ࡣࡌࡵ࡟
 ㉸ఏᑟ࣐ࢢࢿࢵࢺࡀసࡾࡔࡍ☢ሙศᕸཬࡧ☢ሙᙉᗘࡢ᝟ሗࡣ㸪ࢪࣕ࢖ࣟࢺࣟࣥ࡜㉸
ఏᑟ࣐ࢢࢿࢵࢺࡢ࢔ࣛ࢖࣓ࣥࢺࢆㄪᩚࡍࡿ࡜ࡁࡸ㸪ࢪࣕ࢖ࣟࢺࣥࡢⓎ᣺≉ᛶ㸪≉࡟ࣔ
࣮ࢻ᥈⣴ཬࡧྠᐃ᫬࡟ᙺ❧ࡘࠋ☢ሙᙉᗘࡣ㏻ᖖ㸪ࢥ࢖ࣝࡢᕳࡁ⥺ࢹ࣮ࢱࢆᇶ࡟୺☢ሙ
ࢥ࢖ࣝ㟁ὶࡢ್࠿ࡽ☢ሙᙉᗘィ⟬ࢆ⾜࠸ồࡵࡿࠋࡋ࠿ࡋ㸪ィ⟬࡟ࡼࡗ࡚ồࡲࡿ☢ሙᙉ
ᗘ࡜ᐇ㝿࡟Ⓨ⏕ࡋ࡚࠸ࡿ☢ሙᙉᗘ࡟ࡣ㸪ࢥ࢖ࣝ࿘ࡾࡢ☢ᛶయࡢᙳ㡪ࡸ㸪㉸ఏᑟ⥺ࡀᣢ
ࡘࣄࢫࢸࣜࢫ࡞࡝ࡢᙳ㡪࡟ࡼࡾ␗࡞ࡿࠋࡲࡓ㸪☢ሙᙉᗘศᕸ࡟ࡘ࠸࡚ࡣ㸪ࢡࣛ࢖࢜ࢫ
ࢱࢵࢺ࡜㉸ఏᑟ⥺ࡢ࢔ࣛ࢖࣓ࣥࢺࡢࢬࣞ࡟ࡼࡾኚ໬ࡍࡿࠋࡑࡢࡓࡵ㸪ᐇ㝿࡟Ⓨ⏕ࡋ࡚
࠸ࡿ☢ሙᙉᗘཬࡧ☢ሙᙉᗘศᕸࢆ▱ࡿࡓࡵ࡟ࡣ㸪┤᥋☢ሙᙉᗘࢆ ᐃࡍࡿᚲせࡀ࠶ࡿࠋ
 ☢ሙᙉᗘ ᐃࡢ୍⯡ⓗ࡞ᡭἲ࡜ࡋ࡚㸪࢞࢘ࢫ࣓࣮ࢱ࡟ࡼࡿ ᐃࡀ࠶ࡿࠋࡇࡢ ᐃἲ
ࡣ㸪ẚ㍑ⓗ࡟ᐜ᫆࡟ฟ᮶ࡿࡢ࡛㸪ࡼࡃ⏝࠸ࡽࢀࡿࠋࡋ࠿ࡋ㸪࢞࢘ࢫ࣓࣮ࢱࡣ㸪࣮࣍ࣝ
⣲Ꮚࢆ⏝࠸࡚࠸ࡿࡓࡵ㸪᪉ྥ౫Ꮡᛶࡀ࠶ࡾ㸪⤯ᑐᙉᗘࢆṇ☜࡟ ᐃࡍࡿࡇ࡜ࡣᅔ㞴࡛
࠶ࡿࠋ
 㟁Ꮚࢫࣆࣥඹ㬆ศගἲ(Electron Spin Resonance spectroscopy) ࢆ⏝࠸ࡓ☢ሙᙉᗘ ᐃ
ࡣ࢞࢘ࢫ࣓࣮ࢱ࡟ࡼࡿ ᐃ࡟ẚ࡭㸪⿦⨨ࡀ」㞧࡟࡞ࡿࡶࡢࡢ㸪㧗⢭ᗘ࡛ࡢ ᐃࡀᮃࡵ
ࡿࠋ ᐃ⢭ᗘࡣ㸪ග※ࡢ࿘ἼᩘᏳᐃᛶ㸪ฟຊᏳᐃᛶཬࡧ㸪࿘Ἴᩘᖜ࡟౫Ꮡࡍࡿࠋࡑࡇ
࡛㸪ග※࡟ࡣ㸪ẚ㍑ⓗ㧗࿘Ἴ㡿ᇦ࡟࠾࠸࡚㸪Ᏻᐃ࡞Ⓨ᣺ࡣᚓࡽࢀࡿ࢞ࣥⓎ᣺ჾࢆ౑⏝
ࡋࡓࠋࡲࡓ㸪࢞ࣥⓎ᣺ჾࡢⓎ᣺࿘Ἴᩘࡣ ᗘ࡟ࡼࡾኚ໬ࡍࡿࡓࡵ㸪ඹ㬆᫬ࡢṇ☜࡞࿘
Ἴᩘࢆ▱ࡿࡓࡵ࡟ࡣ㸪ᖖ࡟Ⓨ᣺࿘Ἴᩘࡢィ ࡀᚲせࡀ࠶ࡿࠋࡑࡇ࡛㸪ṇ☜࡞࿘Ἴᩘࡀ
ᢕᥱ࡛ࡁࡿࡼ࠺࡟㸪࣊ࢸࣟࢲ࢖ࣥཷಙ⣔ࢆ⏝࠸࡚ィ ࡋ࡞ࡀࡽ☢ሙᙉᗘ ᐃࢆ⾜ࡗࡓࠋ
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㸰ཎ⌮
 㟁Ꮚࡢ☢Ẽ࣮࣓ࣔࣥࢺ ȣVࡣゅ㐠ື㔞 O㸪࣮࣎࢔☢Ꮚ ș%㸪J ್ࢆ⏝࠸࡚
ȣVӇ㺎 Jș%Oα Ѹ
࡜᭩ࡅࡿࠋα ࡣࣉࣛࣥࢡᐃᩘࢆ ȧ ࡛๭ࡗࡓ್࡛࠶ࡿࠋ༳ຍ☢ሙ࡟ᑐࡍࡿ┦஫స⏝࢚
ࢿࣝࢠ࣮ࡣ☢Ẽ࣮࣓ࣔࣥࢺ ȣV࡜☢ሙ % ࡼࡾ㸪
(㸻㺎 ȣV࣭% Ѹ

⦂  完⇫ሺቂᨔᨕᨖኖኣዙን (㸻Jș%O]%α  㺎 
114 115
࡜࡞ࡿࠋO]ࡢᅛ᭷್ࡣ࢔ࢵࣉࢫࣆࣥα࡜ࢲ࢘ࣥࢫࣆࣥ㺎 α ࡛࠶ࡾ㸪࢚ࢿࣝࢠ
࣮‽఩ᕪࡣ
Ǽ(㸻Jș%α%α 㺎 Jș%㺎 α%α 㸻 Jș%% Ѹ
࡛࠶ࡿࠋࢫࣆࣥඹ㬆᫬ࡢඹ㬆࿘Ἴᩘࢆ I࡜ࡍࡿ࡜
KI㸻Jș%%
࡜࡞ࡾ㸪ࡇࢀࢆ☢ሙᙉᗘ࡟ࡘ࠸࡚ゎࡃ࡜
%㸻KIJș%
࡜ඹ㬆࿘Ἴᩘ࠿ࡽ☢ሙᙉᗘࡀồࡵࡽࢀࡿ>@ࠋ

ᐇ㦂⿦⨨
 ☢ሙᙉᗘศᕸࢆ ᐃࡍࡿࡓࡵ࡟ࡣ㸪ヨᩱࡢ఩⨨ࢆ⣽࠿ࡃṇ☜࡟ື࠿ࡍᚲせࡀ࠶ࡿࠋ
ࡇࡢࡓࡵ࡟ࡣ㸪 ḟඖⓗ࡟⮬⏤⮬ᅾ࡟ື࠿ࡍࡇ࡜ࡢฟ᮶ࡿࢫࢸ࣮ࢪࡀᚲせ࡛࠶ࡿࠋࡑ
ࡇ࡛㸪ࡇࢀࢆᐇ⌧࡛ࡁࡿࡼ࠺㸪;<= ࢫࢸ࣮ࢪࢆ〇సࡋࡓࠋ௒ᅇ〇సࡋࡓ ;<= ࢫࢸ࣮ࢪ
ࢆᅗ  ࡟♧ࡍࠋᮦ㉁ࡣ࢔࣑ࣝࢽ࣒࡛࢘࠶ࡿࠋ୺☢ሙ࣐ࢢࢿࢵࢺ࡜ࡣᑍษࡾ㸱ᮏࢆ⏝࠸
ࡿࡇ࡜࡟ࡼࡾ㧗ࡉࢆᚤㄪᩚࡋ࡞ࡀࡽᅛᐃ࡛ࡁࡿࠋ;<= ᪉ྥࡣᅗ  ࡢᶵᕤ࡟࡞ࡗ࡚࠾ࡾ㸪
ୗࡢẁࡢࢫࢡ࣮ࣜࣗ࣎ࣝࢺ࡟ἢࡗ࡚㸪ୖࡢẁࡢ࣮ࣞࣝࡀືࡃࡼ࠺࡟࡞ࡗ࡚࠸ࡿࠋ
 ḟ࡟㸪ヨᩱᅛᐃࡍࡿ⿦⨨࡟ࡘ࠸࡚㏙࡭ࡿࠋ(65 ศගࢆ⾜࠺࡟ࡣ㸪61 ẚࢆ኱ࡁࡃࡍࡿ
ࡓࡵ࡟ࡶ㸪㟁☢ἼࢆⰋࡃ㏻ࡍᶵᕤࡀᚲせ࡛࠶ࡿࠋࡲࡓ㸪⣽࠿ࡃ☢ሙᙉᗘศᕸࢆ࡜ࡿࡓ
ࡵ࡟ࡣ㸪ヨᩱࡢ㠃✚ࡣ࡞ࡿ࡭ࡃᑠࡉ࠸᪉ࡀࡼ࠸ࠋࡑࡢࡵ࡟ࡣ㸪㐺ษ࡞ࢧ࢖ࢬࡢヨᩱᅛ
ᅗ 〇సࡋࡓ㹖㹗㹘ࢫࢸ࣮ࢪ
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ᅗ ࢫࣛ࢖ࢻᶵᕤᴫ␎ᅗ
116 117
ᐃලࡀᚲせ࡛࠶ࡿࠋᅗ  ࡜ᅗ  ࡟〇సࡋࡓᑟἼ⟶ᅛᐃලࡢእほᅗཬࡧᴫ␎ᅗࢆࡑࢀࡒ
ࢀ♧ࡍࠋ㸰ᯛࡢ࢔࣑ࣝᲬ࡟㹓ࣂࣥࢻᑟἼ⟶ࡀᣳࡲࡗ࡚࠸ࡿࠋヨᩱࡣ㸪 ᮏࡢᑟἼ⟶࡟
ࢸࣇࣟࣥࢸ࣮ࣉ࡛ᕳ࠿ࢀ㸪ᣳࡳ㎸ࡴࡇ࡜࡛ᅛᐃࡉࢀ࡚࠸ࡿࠋ
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ᐇ㦂᪉ἲ
୺☢ሙࢥ࢖ࣝ࡟ὶࢀ࡚࠸ࡿ㟁ὶ࡟ᑐࡋ࡚㸪㟁※ࣔࢽࢱ࣮࡟⾲♧ࡉࢀࡿ☢ሙᙉᗘ࡜ᐇ㝿
࡟Ⓨ⏕ࡋ࡚࠸ࡿ☢ሙᙉᗘ࡟ࡣᕪࡀ࠶ࡿࠋࡇࡢཎᅉ࡜ࡋ࡚㸪㉸ఏᑟ࣐ࢢࢿࢵࢺ࡟⏝࠸࡚
࠸ࡿ⥺ᮦ࡟ࡼࡿࣄࢫࢸࣜࢩࢫ࡟ࡼࡿᙳ㡪ࡸࢥ࢖ࣝ࿘ࡾࡢ≀㉁ࡀ☢໬ࡋ࡚࠸ࡿࡓࡵ࡟㉳
ࡇࡿ☢ሙᙉᗘ࡬ࡢᙳ㡪ࡀ࠶ࡿࠋࡇࢀࡽࢆㄪ࡭ࡿࡓࡵ࡟ᐇ㦂ࢆ⾜ࡗࡓࠋᅗ㸳࡟ 7 ࣊ࣜ
ᅗ ᑟἼ⟶ᅛᐃල
ᅗ ヨᩱᅛᐃ㒊ᴫ␎ᅗ
116 117
࣒࢘ࣇ࣮ࣜ㉸ఏᑟ࣐ࢢࢿࢵࢺࡢእほᅗ࠾ࡼࡧᐇ㦂࡟⏝࠸ࡓᗙᶆ⣔ࢆ♧ࡍࠋࡇࡢ࣐ࢢࢿ
ࢵࢺࡢ⥺ᮦࡣ 1E6Q ཬࡧ 1E7L ࡛࠶ࡿࠋ㟁ὶ㔞 $ ࡟࠾࠸࡚ 7 ࡢ☢ሙᙉᗘࢆ㐩
ᡂࡍࡿࠋᣦᶆ࡜࡞ࡿヨᩱ࡟ࡣ '33+ ࢆ⢊యࡢ≧ែ࡛⏝࠸࡚࠸ࡿࠋࡇࡢࡓࡵ㸪᪉ྥ౫Ꮡᛶ
ࢆ⪃࠼࡞ࡃ࡚ࡶⰋ࠸ࠋ(65 ศගග※࡟ࡣ㸪㧗࿘Ἴ࡛Ᏻᐃ࡞Ⓨ᣺ࡀᚓࡽࢀ㸪Ⓨ᣺࿘Ἴᩘ
ᖜࡀࢩ࣮ࣕࣉ࡞࢞ࣥⓎ᣺ჾ*'01R*+]ࢆ⏝࠸ࡓࠋᅗ  ࡟Ⓨ᣺࿘Ἴᩘࡢ
Ⓨ᣺ᖜࢆ♧ࡍࠋ᳨ฟჾ࡟ࡣ㸪㧗࿘Ἴ㡿ᇦ࡟࠾࠸࡚㧗ឤᗘ࡞ࢡࣜࢫࢱࣝࢹ࢕ࢸࢡࢱ࣮
4($)%)%)361㸪*+]*+]P9P:ධຊ࢖ࣥࣆ࣮ࢲࣥࢫ 0Ȑࢆ⏝
࠸ࡓࠋḟ࡟㸪ᅗ  ࡟ ᐃ⿦⨨㓄⨨ᅗࢆ♧ࡍࠋ࢞ࣥⓎ᣺ჾ࡛㟁☢ἼࢆฟຊࡋᑟἼ⟶࡛ఏ
㏦ࡉࡏヨᩱ࡟ධᑕࡍࠋヨᩱࢆ㏱㐣ࡋࡓ㟁☢Ἴࢆࢹ࢕ࢸࢡࢱ᳨࣮࡛ฟᚋ㸪࢔ࣥࣉ࡛ቑᖜ
ࡋ࢜ࢩࣟࢫࢥ࣮ࣉཬࡧ࣐ࣝࢳ࣓࣮ࢱ࡟ධຊ㸪 ᐃࡍࡿࠋ࢜ࢩࣟࢫࢥ࣮ࣉ࡛ほ ࡍࡿ࡜
ࡁࡣ࢜ࣇࢭࢵࢺᅇ㊰࡟ධຊᚋ ᐃࠋࡲࡓ᪉ྥᛶ⤖ྜჾ㒊୍࡛㒊࣑࢟ࢧ࣮࡟ධຊࡍࡿࡇ
࡜࡛ᖖ᫬࿘Ἴᩘࢆ ᐃࡍࡿ࿘Ἴᩘࡀኚືࡍࡿࡓࡵࠋヨᩱࡢ '33+ ࡣ⢊ᮎࡢࡲࡲࢸࣇࣟ
ࣥࢩ࣮࡛ࣝᣳࡳᅛᐃࡋ࡚࠶ࡿࠋ㠃✚⣙ PP


☢ሙᙉᗘ ᐃ
࢜ࢩࣟࢫࢥ࣮ࣉ࡛ほ ࡋ࡞ࡀࡽᤲᘬ㏿ᗘ 7PLQ$PLQ࡛ᤲᘬࡍࡿࡇ࡜࡛㸪
ప☢ሙ࠿ࡽඹ㬆Ⅼ㸦᭱ࡶ㏱㐣ᙉᗘࡀᑠࡉࡃ࡞ࡿⅬ㸧࡟☢ሙࢆྜࢃࡏࡿࠋࡑࡢ᫬ࡢ㸪㟁
ὶ㔞ࣔࢽࢱ࣮࡟⾲♧ࡉࢀࡿ್㸪☢ሙᙉᗘࣔࢽࢱ࣮࡟⾲♧ࡉࢀࡿ್ཬࡧ࣊ࢸࣟࢲ࢖
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ᅗ  ᗙᶆࡢᐃ⩏
㸦࣐ࢢࢿࢵࢺD ୖ㠃E ഃ㠃࠿ࡽぢࡓᅗ㸧
ᅗ ࢞ࣥⓎ᣺ჾࡢⓎ᣺
118 119
ࣥཷಙ⣔࡛ ᐃࡋࡓ࢞ࣥⓎ᣺ࡢ࿘Ἴᩘࢆグ㘓ࠋࡑࡢᚋ㸪ヨᩱࡢᗙᶆࢆኚ࠼࡚ྠᵝ࡟ᐇ
㦂ࢆ⾜࠺ࠋ௒ᅇᐇ㦂ࢆ⾜ࡗࡓ᫬ࡢᗙᶆᐃ⩏ࢆᅗ  ࡟♧ࡍࠋࡇࡢᗙᶆ⣔ࡢཎⅬࡣ࣐ࢢࢿ
ࢵࢺ୰ᚰタィ࡛࠶ࡿࠋ

☢ሙᙉᗘࡢ☢ሙᤲᘬ㏿ᗘ౫Ꮡᛶ
 ☢ሙᤲᘬ㏿ᗘࢆኚ໬ࡉࡏࡿࡇ࡜࡟ࡼࡾ㸪☢ሙࣄࢫࢸࣜࢩࢫ࡟ࡼࡿ☢ሙᙉᗘ࡬ࡢᙳ㡪
ࢆㄪ࡭ࡓࠋ ᐃ᪉ྥࡣ㸪ฟຊࡉࢀࡓ㟁☢Ἴࢆࢹ࢕ࢸࢡࢱ᳨࡛ฟࡋ࢔ࣥࣉ࡛ቑᖜࡋࡓᚋ㸪
ࢹࢪࢱ࣐ࣝࣝࢳ࣓࣮ࢱ࡟ධຊࡋ 3& ࡟ྲྀࡾ㎸ࡴࠋྠ᫬࡟㸪㟁※ࡢฟຊ㟁ὶࡶࢹࢪࢱ࣐ࣝ
ࣝࢳ࣓࣮ࢱ࡟ධຊᚋ㸪3& ࡟ྲྀࡾ㎸ࡴࠋྲྀࡾ㎸ࢇࡔࢹ࣮ࢱ࠿ࡽඹ㬆ࡢ㛤ጞ࡜⤊ࢃࡾࡢ㟁
ᅽ್ࢹࢪࢱ࣐ࣝࣝࢳ࣓࣮ࢱࢆグ㘓ࠋࢹࢪࢱ࣐ࣝࣝࢳ࣓࣮ࢱࡢタᐃࡣ㸪ศゎ⬟ࡣ㧗㏿
㸳᱆࡛࠶ࡾࡇࡢ࡜ࡁࡢ✚ศ᫬㛫 3/&3RZHU/LQH&\FOH㸧࡛࠶ࡿࠋ௨ୗ࡟⾜ࡗࡓ
ᤲᘬ㏿ᗘ࡟ࡘ࠸࡚ࡲ࡜ࡵ࡚♧ࡍࠋ

ᐇ㦂⤖ᯝ
☢ሙᙉᗘ ᐃ
ᅗ  ᐇ㦂⿦⨨㓄⨨ᅗ
118 119
 ⾲  ࡟ヨᩱࡢ఩⨨ࢆኚ໬ࡉࡏࡓ᫬ࡢ⤖ᯝࢆ♧ࡍࠋࡇࡇ࡛㸪;㸪<㸪= ࡣཎⅬ࠿ࡽࡢ
఩⨨㸪I ࡣග※࿘Ἴᩘ㸪% ࡣᘧѸ࠿ࡽ⟬ฟࡉࢀࡿ☢ሙᙉᗘ㸪,㸦㟁※㸧ࡣ㟁※࡟⾲♧
ࡉࢀࡿ㟁ὶ㔞㸪%㸦㟁※㸧ࡣ㟁※࡟⾲♧ࡉࢀࡿ☢ሙᙉᗘࢆࡑࢀࡒࢀࡋࡵࡍࠋ/R ࡣ࣮ࣟ
࢝ࣝ࿘Ἴᩘࢩࣥࢭࢧ࢖ࢨ࣮ࡢ࿘Ἴᩘ%,㟁※ࡣ㸪್ࡀ኱ࡁࡃ࡞࡯࡝☢ሙᙉᗘࡀ
ᙉ࠸ࡇ࡜ࢆ♧ࡍࠋᘧѸ࠿ࡽᑟฟࡉࢀࡿ☢ሙᙉᗘ࡜☢ሙ᥮⟬⣔ᩘ&R-$67(&࠿ࡽᑟ
ฟࡉࢀࡿ☢ሙᙉᗘ࡟ࡣ㸪⣙ ࡢᕪ ᐃ☢ሙࡢ᪉ࡀ⾲♧್ࡼࡾ኱ࡁ࠸ࡀ࠶ࡿࡇ࡜
ࡀศ࠿ࡗࡓࠋ%,㟁※࡟ὀ┠ࡍࡿ࡜㹖㸪㹗᪉ྥ࡟ࡎࢀ࡚ࡶᙉᗘࡣ࡯࡜ࢇ࡝ኚ໬ࡋ࡞࠸ࠋ
㹘᪉ྥ࡛ࡣ  ᩘ࣑࣓࣮ࣜࢺࣝࡎࢀ࡚ࡶᙉᗘࡣ⣙ ࡋ࠿ኚ໬ࡋ࡞࠸ࡇ࡜ࡀศ࠿ࡿࠋ


☢ሙᙉᗘࡢ☢ሙᤲᘬ㏿ᗘ౫Ꮡᛶ
 ⾲ 㸰࡟ᤲᘬ㏿ᗘ࡟ࡼࡿ☢ሙࣄࢫࢸࣜࢩࢫ࡬ࡢᙳ㡪࡟ࡘ࡚ㄪ࡭ࡓ⤖ᯝࢆ♧ࡍࠋ⾲୰
ࡢඹ㬆㸯9㸪9ࡣඹ㬆ࡢጞࡲࡾ࠾ࡼࡧ⤊ࢃࡾᅗ 㸪ඹ㬆㸯$㸪$ࡣඹ㬆㸯9㸪
9ࢆ  ಸ㟁※㟁ὶ 㸿᫬ࢹࢪࢱ࣐ࣝࣝࢳ࣓࣮ࢱ㟁ᅽ 9 ࠿ࡽ⟬ฟࡋࡓ
್㸪% ࡣᘧѸ࠿ࡽ⟬ฟࡉࢀࡿ☢ሙᙉᗘ㸪Ș ࡣ %ඹ㬆 ඹ㬆 ࡛࠶ࡿࠋ☢ሙ
ᤲᘬ㏿ᗘࡀ $ ࡢ᫬௨እࡢ᫬ Ș ࡣ  ࡛࠶ࡿࡢ࡟ᑐࡋ࡚ $ ࡢ᫬ࡣୖ᪼᫬
ୗ㝆᫬  ࡜࡝ࡕࡽࡶ⣙  ࡢᕪࡀ࠶ࡿࣄࢫࢸࣜࢩࢫࡀ࠶ࡿሙྜ㸪
ୖ᪼᫬ࡣඹ㬆☢ሙ࡟࡞ࡿ࡜ࡁࢥ࢖ࣝ㟁ὶࡀ኱ࡁ࠸᪉࡟ࢩࣇࢺࡍࡿࡓࡵ Ș ࡣᑠࡉ࡞್࡟
࡞ࡿࠋ୍᪉ୗ㝆᫬ࡣ㏫࡛ࢥ࢖ࣝ㟁ὶࡣᑠࡉࡃ࡞ࡿࡢ࡛ Ș ࡣ኱ࡁ࡞್࡟࡞ࡿࠋ
 ᐇ㦂㸲㸲̓࡜ 㸵̓ࢆẚ࡭ࡿ࡜ඹ㬆☢ሙ௜㏆࠿ࡽᤲᘬࡋࡓࡶࡢ࡜᭱㧗☢ሙ7
࠿ࡽᤲᘬࡋࡓࡶࡢ࡜࡛ࡣ㸪㐪࠸ࡣ↓࠸ࡇ࡜ࡀศ࠿ࡿࠋࡋ࠿ࡋ㸪ᐇ㦂㸶࡜ᐇ㦂㸶̓ࢆẚ
࡭ࡿ࡜ᐇ㦂㸶࡛ࡣࣄࢫࢸࣜࢩࢫࡣぢཷࡅࡽࢀ࡞࠸ࡀ㸪ᐇ㦂㸶͂࡟ࡣࣄࢫࢸࣜࢩࢫࡀ࠶
ࡿࡼ࠺࡞⤖ᯝࡀᚓࡽࢀࡓࠋ
㸨෌⌧ᐇ㦂ᐇ㦂㸲ࠥᐇ㦂㸴࡛ࡣᐇ㦂 ࠥᐇ㦂㸱ࡲ࡛ࡢ⤖ᯝ࡜ᑠᩘⅬ௨ୗ  ᱆ࡲ࡛ྠ
ࡌᩘ್ࡀᚓࡽࢀࡓࠋࡇࢀࡣ㸪෌⌧ᛶࡀⰋ࠸ࡇ࡜ࢆ♧ࡋ㸪ࡲࡓ㹃㹑㹐ศගࡀ☢ሙᙉᗘ 
ᐃ࡟᭷ຠ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ☢ሙᤲᘬ㏿ᗘࡀ $ ࡢ᫬௨እࡢ᫬ Ș ࡣ  ࡛࠶
ࡿࡢ࡟ᑐࡋ࡚ $ ࡢ᫬ࡣୖ᪼᫬ ୗ㝆᫬  ࡜࡝ࡕࡽࡶ⣙  ࡢ
ᕪࡀ࠶ࡿࣄࢫࢸࣜࢩࢫࡀ࠶ࡿሙྜ㸪ୖ᪼᫬ࡣඹ㬆☢ሙ࡟࡞ࡿ࡜ࡁࢥ࢖ࣝ㟁ὶࡀ኱ࡁ࠸
᪉࡟ࢩࣇࢺࡍࡿࡓࡵ Ș ࡣᑠࡉ࡞್࡟࡞ࡿࠋ୍᪉ୗ㝆᫬ࡣ㏫࡛ࢥ࢖ࣝ㟁ὶࡣᑠࡉࡃ࡞ࡿ
ࡢ࡛ Ș ࡣ኱ࡁ࡞್࡟࡞ࡿࠋ

120 121
ᤲᘬ㏿ᗘ
ᐇ㦂㸯   0 A ĺ 35 A,  4.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -4.00 A/min 
ᐇ㦂㸰    0 A ĺ 35 A,  2.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -2.00 A/min 
ᐇ㦂㸱    0 A ĺ 35 A,  1.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -1.00 A/min 
㸨ᐇ㦂㸲  0 A ĺ 35 A,  4.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -4.00 A/min 
㸨ᐇ㦂㸳  0 A ĺ 35 A,  2.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -2.00 A/min 
㸨ᐇ㦂㸴  0 A ĺ 35 A,  1.00 A/min    ᐇ㦂㸯’ 35 A ĺ 0 A,  -1.00 A/min 
ᐇ㦂㸵    0 A ĺ 30 A,  4.00 A/min     30 A ĺ 120.087 A,  4.00 A/min 
ᐇ㦂 7‘   120.087 A ĺ 35 A  -4.00 A/min,    35 A ĺ 0 A,  -4.00 A/min 
ᐇ㦂㸶    0 A ĺ 30 A  2.00 A/min,    30 A ĺ 35 A,  2.00 A/min 
30 A ĺ 35 A  4.00 A/min 
ᐇ㦂 8‘   120.087 A ĺ 35 A  4.00 A/min,     35 A ĺ 0 A,  -2.00 A/min 
㸨ᐇ㦂 4ࠥ6 ࡣᐇ㦂㸯ࠥ㸱ࡢ෌⌧ᛶࢆ☜࠿ࡵࡿࡓࡵ࡟⾜ࡗࡓࠋ


⾲  ☢ሙᙉᗘ ᐃ
ୖ᪼, 0.005T/min㻌
X(mm) Y(mm) Z(mm) Lo(GHz) f (GHz) B(T) I(㟁
※)(A)
B(㟁
※)(T) B/I(㟁※) B (㟁※)/I(㟁※)
0.00 0.00 3.03 10.74786 119.2265 4.25158 33.85500 4.22880 0.12558㻌 0.12491㻌
5.42 0.00 3.03 10.74828 119.2311 4.25174 33.85100 4.22830 0.12560㻌 0.12491㻌
-5.68 0.00 3.03 10.74859 119.2345 4.25186 33.85600 4.22890 0.12559㻌 0.12491㻌
0.00 9.42 3.03 10.74865 119.2352 4.25189 33.84900 4.22800 0.12561㻌 0.12491㻌
0.00 -4.18 3.03 10.74869 119.2356 4.25190 33.85500 4.22880 0.12559㻌 0.12491㻌
0.00 0.00 16.23 10.74870 119.2357 4.25191 33.93000 4.23810 0.12531㻌 0.12491㻌
0.00 0.00 -13.77 10.74877 119.2365 4.25193 33.90000 4.23450 0.12543㻌 0.12491㻌
0.00 0.00 6.06 10.74877 119.2365 4.25193 33.86700 4.23030 0.12555㻌 0.12491㻌
㻌 㻌

 ᐇ㦂㸲㸲̓࡜ 㸵̓ࢆẚ࡭ࡿ࡜ඹ㬆☢ሙ௜㏆࠿ࡽᤲᘬࡋࡓࡶࡢ࡜᭱㧗☢ሙ7
࠿ࡽᤲᘬࡋࡓࡶࡢ࡜࡛ࡣ㸪㐪࠸ࡣ↓࠸ࡇ࡜ࡀศ࠿ࡿࠋࡋ࠿ࡋ㸪ᐇ㦂㸶࡜ᐇ㦂㸶̓ࢆẚ
࡭ࡿ࡜ᐇ㦂㸶࡛ࡣࣄࢫࢸࣜࢩࢫࡣぢཷࡅࡽࢀ࡞࠸ࡀ㸪ᐇ㦂㸶͂࡟ࡣࣄࢫࢸࣜࢩࢫࡀ࠶
ࡿࡼ࠺࡞⤖ᯝࡀᚓࡽࢀࡓࠋ
120 121
㸨෌⌧ᐇ㦂ᐇ㦂㸲ࠥᐇ㦂㸴࡛ࡣᐇ㦂 ࠥᐇ㦂㸱ࡲ࡛ࡢ⤖ᯝ࡜ᑠᩘⅬ௨ୗ  ᱆ࡲ࡛ྠ
ࡌᩘ್ࡀᚓࡽࢀࡓࠋࡇࢀࡣ㸪෌⌧ᛶࡀⰋ࠸ࡇ࡜ࢆ♧ࡋ㸪ࡲࡓ㹃㹑㹐ศගࡀ☢ሙᙉᗘ 
ᐃ࡟᭷ຠ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ


⾲ 5-2 ☢ሙᤲᘬ㏿ᗘ
35.00Aĺ2.913V㻌 X,Y,Z=0, 0, 6.06 
㻌 I(㟁※)㻌 ୖ᪼⋡A/min㻌
ඹ㬆 1
(V)㻌
ඹ㬆 2
(V)㻌
ඹ㬆 1
(A)㻌
ඹ㬆 2
(A)㻌 Lo(GHz)
f
(GHz) B (T) 
Į
(T/A)㻌
ᐇ㦂 1㻌 0ĺ35A㻌 4.00㻌 2.819㻌 2.820 33.871 33.883 10.74830 119.2313 4.25175㻌 0.12551
ᐇ㦂 1’㻌 35ĺ0A㻌 -4.00㻌 2.817㻌 2.818 33.847 33.859 10.74830 119.2313 4.25175㻌 0.12560
ᐇ㦂 2㻌 0ĺ35A㻌 2.00㻌 2.818㻌 2.819 33.859 33.871 10.74838 119.2322 4.25178㻌 0.12555
ᐇ㦂 2’㻌 35ĺ0A㻌 -2.00㻌 2.818㻌 2.819 33.859 33.871 10.74838 119.2322 4.25178㻌 0.12555
ᐇ㦂 3㻌 0ĺ35A㻌 1.00㻌 2.818㻌 2.819 33.859 33.871 10.74812 119.2293 4.25168㻌 0.12555
ᐇ㦂 3’㻌 35ĺ0A㻌 -1.00㻌 2.818㻌 2.819 33.859 33.871 10.74828 119.2311 4.25174㻌 0.12555
ᐇ㦂 4㻌 0ĺ35A㻌 4.00㻌 2.819㻌 2.820 33.871 33.883 10.74849 119.2334 4.25182㻌 0.12551
ᐇ㦂 4’㻌 35ĺ0A㻌 -4.00㻌 2.818㻌 2.819 33.859 33.871 10.74849 119.2334 4.25182㻌 0.12555
ᐇ㦂 5㻌 0ĺ35A㻌 2.00㻌 2.818㻌 2.819 33.859 33.871 10.74849 119.2334 4.25182㻌 0.12555
ᐇ㦂 5’㻌 35ĺ0A㻌 -2.00㻌 2.818㻌 2.819 33.859 33.871 10.74849 119.2334 4.25182㻌 0.12555
ᐇ㦂 6㻌 0ĺ35A㻌 1.00㻌 2.818㻌 2.819 33.859 33.871 10.74865 119.2352 4.25189㻌 0.12556
ᐇ㦂 6’㻌 35ĺ0A㻌 -1.00㻌 2.818㻌 2.819 33.859 33.871 10.74865 119.2352 4.25189㻌 0.12556
ᐇ㦂 7㻌 0ĺ30A㻌 4.00㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌
ᐇ㦂 7㻌 30ĺ120.087A㻌 4.00㻌 2.819㻌 2.820 33.871 33.883 10.74801
119.2
281 4.25164㻌 0.12550
ᐇ㦂 7’㻌 120.087ĺ35A㻌 -4.00㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌
ᐇ㦂 7’㻌 35ĺ0A㻌 -4.00㻌 2.817㻌 2.818 33.847 33.859 10.74763 119.2239 4.25149㻌 0.12559
ᐇ㦂 8㻌 0ĺ30A㻌 4.00㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌
ᐇ㦂 8㻌 30ĺ35A 2.00㻌 2.818㻌 2.819 33.859 33.871 10.74758 119.2234 4.25147㻌 0.12554
ᐇ㦂 8㻌 35ĺ120.087A㻌 4.00㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌
ᐇ㦂 8’㻌 120.087ĺ35A㻌 -4.00㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌
ᐇ㦂 8’㻌 35ĺ0A㻌 -2.00㻌 2.817㻌 2.818 33.847 33.859 10.74767 119.2244 4.25150㻌 0.12559
㻌
㻌  

122
ࡲ࡜ࡵ
࣭(65 ศගࢆ⏝࠸ࡓ☢ሙᙉᗘ ᐃࢆ⾜ࡗࡓࠋ☢ሙᙉᗘ ᐃࢆ⾜ࡗࡓ⤖ᯝ㸪㟁※ࣔࢽࢱ
࣮࡟⾲♧ࡉࡏࡿ☢ሙᙉᗘ࡜ ᐃ࠿ࡽồࡵࡓ☢ሙᙉᗘ࡟ࡣ⣙ 㸣ࡢᕪࡀ⏕ࡌࡿࡇ࡜ࡀ
☜ㄆ࡛ࡁࡓࠋ☢ሙࣄࢫࢸࣜࢩࢫ࡟࠾࠸࡚ࡣᤲᘬ㏿ᗘ ࡼࡾ㐜࠸㏿ᗘࡢሙྜ࡟ࡣࣄ
ࢫࢸࣜࢩࢫࡣ↓࠸࡜࠸࠺⤖ᯝࡀᚓࡽࢀࡓࠋ㹃㹑㹐ศගࢆ⏝࠸ࡓ☢ሙᙉᗘ ᐃࡣ࢞࢘ࢫ
࣓࣮ࢱࡢ ᐃࡼࡾࡶࡼࡾ㧗⢭ᗘ࡞☢ሙᙉᗘ ᐃࡀ⾜࠼ࡿᐇ㦂࡛࠶ࡿ࡜⪃࠼ᚓࡿ⤖ᯝࢆ
ᚓࡽࢀࡓࠋ


ཧ⪃ᩥ⊩
>㸯@ᑠฟ᫛୍㑻 ⴭ ࠕ㔞Ꮚㄽࠖ 　⳹ᡣ 㸦㸧



Measurement of Magnetic Field Intensity by Using Electron-Spin Resonance

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