IEC TR 62797:2013

International comparison of measurements of the magnetic moment using vibrating sample magnetometers (VSM) and superconducting quantum interference device (SQUID) magnetometers

IEC/TR 62797:2013(E) provides the results of an international comparison of measurements of the magnetic moment, using vibrating sample magnetometers (VSM) and superconducting quantum interference device (SQUID) magnetometers. The basic object of this comparison is to verify the degree of reproducibility of the method employed as a prerequisite for the prospective development of a related IEC measuring standard.

General Information

• Status: Published
• Publication Date: 05-Aug-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.030 - Magnetic materials
• Technical Committee: TC 68 - Magnetic alloys and steels
• Drafting Committee: WG 2 - TC 68/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 15-Oct-2013
• Completion Date: 06-Aug-2013

Standards Content (Sample)

IEC/TR 62797 ®
Edition 1.0 2013-08
TECHNICAL
REPORT
colour
inside
International comparison of measurements of the magnetic moment using
vibrating sample magnetometers (VSM) and superconducting quantum
interference device (SQUID) magnetometers

IEC/TR 62797:2013(E)
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IEC/TR 62797 ®
Edition 1.0 2013-08
TECHNICAL
REPORT
colour
inside
International comparison of measurements of the magnetic moment using

vibrating sample magnetometers (VSM) and superconducting quantum

interference device (SQUID) magnetometers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 29.030 ISBN 978-2-8322-1018-5

– 2 – TR 62797  IEC:2013(E)
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Overview . 7
3 Samples . 8
3.1 Hard ferrites . 8
3.2 Magnetic tapes . 8
4 Measuring quantities and measuring conditions . 8
4.1 General . 8
4.2 Hard ferrite spheres . 8
4.3 Magnetic tape samples . 9
4.4 Role of the measuring temperature . 9
5 Analysis of the measured quantities . 10
Annex A (informative) International comparison of measurements of the magnetic
moment using vibrating sample magnetometers and SQUID magnetometers . 15
Annex B (informative) Participants . 30
Bibliography . 31

Figure 1 – Isotropic and anisotropic ferrites: standard deviations . 12
Figure 2 – Magnetic tape samples: standard deviations . 12
Figure 3 – Isotropic and anisotropic ferrites: weighted uncertainties . 13
Figure 4 – Magnetic tape samples: weighted uncertainties . 13
Figure 5 – Normalized best values y /< y> of the coercive field strength H and
i cJ
maximum energy product (BH) . 14
max
Figure A.1 – Dispersion of the J values measured by the participating laboratories
800k
on the isotropic ferrite sample HF-Iso1 . 16
Figure A.2 – Dispersion of the J values measured by the participating laboratories on
r
the isotropic ferrite sample HF-Iso1 . 17
Figure A.3 – Dispersion of the H values measured by the participating laboratories
cJ
on the isotropic ferrite sample HF-Iso1 . 18
Figure A.4 – Dispersion of the H values measured by the participating laboratories
cB
on the isotropic ferrite sample HF-Iso1 . 19
Figure A.5 – Dispersion of the (BH) values measured by the participating
max
laboratories on the isotropic ferrite sample HF-Iso1 . 20
Figure A.6 – Dispersion of the J values measured by the participating laboratories
800k
on the anisotropic ferrite sample HF-Aniso1 . 21
Figure A.7 – Dispersion of the J values measured by the participating laboratories on
r
the anisotropic ferrite sample HF-Aniso1. 22
Figure A.8 – Dispersion of the H values measured by the participating laboratories
cJ
on the anisotropic ferrite sample HF-Aniso1 . 23
Figure A.9 – Dispersion of the H values measured by the participating laboratories
cB
on the anisotropic ferrite sample HF-Aniso1 . 24
Figure A.10 – Dispersion of the (BH) values measured by the participating
max
laboratories on the anisotropic ferrite sample HF-Aniso1 . 25
Figure A.11 – Dispersion of the m values measured by the participating
400k
laboratories on the magnetic tape sample A1 . 26

TR 62797  IEC:2013(E) – 3 –
Figure A.12 – Dispersion of the m values measured by the participating laboratories
r
on the magnetic tape sample A1 . 27
Figure A.13 – Dispersion of the S = m /m values measured by the participating
r 400k
laboratories on the magnetic tape sample A1 . 28
Figure A.14 – Dispersion of the H values measured by the participating laboratories
cJ
on the magnetic tape sample A1 . 29

Table A.1 – Magnetic polarization value J at H = H = 800 kA/m measured by
800k a peak
the participating laboratories on the isotropic hard ferrite HF-Iso1 . 15
Table A.2 – Remanent magnetic polarization J measured by the participating
r
laboratories on the isotropic hard ferrite HF-Iso1 . 17
Table A.3 – Coercive field H measured by the participating laboratories on the
cJ
isotropic hard ferrite HF-Iso1 . 18
Table A.4 – Coercive field H measured by the participating laboratories on the
cB
isotropic hard ferrite HF-Iso1 . 19
Table A.5 – Maximum energy product (BH) measured by the participating
max
laboratories on the isotropic hard ferrite HF- Iso1 . 20
Table A.6 – Magnetic polarization value J at H = H = 800 kA/m measured by
800k a peak
the participating laboratories on the anisotropic hard ferrite HF-Aniso1 . 21
Table A.7 – Remanent magnetic polarization J measured by the participating
r
laboratories on the anisotropic hard ferrite HF-Aniso1. 22
Table A.8 – Coercive field H measured by the participating laboratories on the
cJ
anisotropic hard ferrite HF-Aniso1 . 23
Table A.9 – Coercive field H measured by the participating laboratories on the
cB
anisotropic hard ferrite HF-Aniso1 . 24
Table A.10 – Maximum energy product (BH) measured by the participating
max
laboratories on the anisotropic hard ferrite HF- Aniso1. 25
Table A.11 – Magnetic moment m measured at at H = H = 400 kA/m by the
400k a peak
participating laboratories on the magnetic tape sample 1A . 26
Table A.12 – Remanent magnetic moment m measured by the participating
r
laboratories on the magnetic tape sample 1A . 27
Table A.13 – Squareness ratio S = m /m measured by the participating
r 400k
laboratories on the magnetic tape sample 1A . 28
Table A.14 – Coercive field H measured by the participating laboratories on the
cJ
magnetic tape sample 1A . 29

– 4 – TR 62797  IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INTERNATIONAL COMPARISON OF MEASUREMENTS OF
THE MAGNETIC MOMENT USING VIBRATING SAMPLE
MAGNETOMETERS (VSM) AND SUPERCONDUCTING
QUANTUM INTERFERENCE DEVICE (SQUID) MAGNETOMETERS

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