407:
128:
390:, and is assumed in some models to represent the lowest-energy state for a given field. There are several ways for experimental measurement of the anhysteretic magnetization curve, based on fluxmeters and DC biased demagnetization. ARM has also been studied because of its similarity to the write process in some magnetic recording technology and to the acquisition of
609:
803:
303:
Another kind of IRM can be obtained by first giving the magnet a saturation remanence in one direction and then applying and removing a magnetic field in the opposite direction. This is called
382:. This is induced by exposing a magnet to a large alternating field plus a small DC bias field. The amplitude of the alternating field is gradually reduced to zero to get an
259:
Often a single measure of remanence does not provide adequate information on a magnet. For example, magnetic tapes contain a large number of small magnetic particles (see
1014:
386:, and then the bias field is removed to get the remanence. The anhysteretic magnetization curve is often close to an average of the two branches of the
170:
The default definition of magnetic remanence is the magnetization remaining in zero field after a large magnetic field is applied (enough to achieve
64:
is removed. Colloquially, when a magnet is "magnetized", it has remanence. The remanence of magnetic materials provides the magnetic memory in
984:
McCurrie, R. A.; Gaunt, P. (1966). "The magnetic properties of platinum cobalt near the equiatomic composition part I. the experimental data".
72:. The word remanence is from remanent + -ence, meaning "that which remains". The origins of remanence originate from some point after 1850.
1102:
Pfeiffer, H. (1990). "Determination of anisotropy field distribution in particle assemblies taking into account thermal fluctuations".
336:
of the field. Yet another kind of remanence can be obtained by demagnetizing the saturation remanence in an ac field. This is called
1131:
Wohlfarth, E. P. (1958). "Relations between different modes of acquisition of the remanent magnetization of ferromagnetic particles".
851:
Banerjee, S. K.; Mellema, J. P. (1974). "A new method for the determination of paleointensity from the A.R.M. properties of rocks".
267:). One way to look inside these materials is to add or subtract small increments of remanence. One way of doing this is first
831:
787:
263:), and these particles are not identical. Magnetic minerals in rocks may have a wide range of magnetic properties (see
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17:
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Strictly speaking, it is still in the Earth's field, but that has little effect on the remanence of a
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268:
418:
227:, which measures the response to an AC magnetic field (as in Fig. 1). This is represented by a
463:
777:
171:
111:
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Jaep, W. F. (1969). "Anhysteretic magnetization of an assembly of single-domain particles".
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after the current in the coil is turned off. Where it is unwanted, it can be removed by
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devices, and is used as a source of information on the past Earth's magnetic field in
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203:. If it must be distinguished from other kinds of remanence, then it is called the
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239:. This value of remanence is one of the most important parameters characterizing
223:
In engineering applications the residual magnetization is often measured using a
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1051:"Anhysteretic Magnetization Measurement Methods for Soft Magnetic Materials"
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Jiles, D. C.; Atherton, D. L. (1986). "Theory of ferromagnetic hysteresis".
586:"remanence | Origin and meaning of remanence by Online Etymology Dictionary"
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If the particles are noninteracting single-domain particles with uniaxial
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This article is about magnetic remanence. For the data storage term, see
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Fitzgerald, A.E.; Kingsley, Charles Jr.; Umans, Stephen D. (2003).
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divided by the volume of the sample) and denoted in equations as
183:
182:; and the zero-field intercept is a measure of the remanence. In
1172:
475:
500:
243:; it measures the strongest magnetic field they can produce.
366:, there are simple linear relations between the remanences.
247:, for example, have a remanence approximately equal to 1.3
127:
57:
776:
Juha Pyrhönen; Tapani
Jokinen; Valéria Hrabovcová (2009).
91:
a large residual magnetization is not desirable (see also
178:
is measured using instruments such as a vibrating sample
819:
771:
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610:"5.01.3.1 Early Observation of the Remanence of Rocks"
271:
the magnet in an AC field, and then applying a field
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79:is generally used in engineering applications. In
826:(6th ed.). McGraw-Hill. pp. 688 pages.
804:"COBALT: Essential to High Performance Magnetics"
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1168:Coercivity and Remanence in Permanent Magnets
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277:and removing it. This remanence, denoted by
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342:alternating field demagnetization remanence
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110:is used for remanence measured in units of
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380:anhysteretic remanent magnetization (ARM)
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374:Another kind of laboratory remanence is
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298:isothermal remanent magnetization (IRM)
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27:Magnetization left behind in a material
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779:Design of Rotating Electrical Machines
468:0.82–1.16 T (8,200–11,600 G)
209:saturation isothermal remanence (SIRM)
809:. Arnold Magnetic Technologies. 2012.
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782:. John Wiley and Sons. p. 232.
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634:"Magnetic Tape Storage and Handling"
505:0.9–1.4 T (9,000–14,000 G)
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493:1–1.3 T (10,000–13,000 G)
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884:. AN IEEE Press Classic Reissue.
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540:Viscous remanent magnetization
392:natural remanent magnetization
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880:Bozorth, Richard M. (1993) .
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977:10.1016/0304-8853(86)90066-1
873:10.1016/0012-821X(74)90190-3
754:. Hill Technical Sales. 2006
535:Thermoremanent magnetization
338:AC demagnetization remanence
309:DC demagnetization remanence
174:). The effect of a magnetic
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740:Banerjee & Mellema 1974
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481:1.28 T (12,800 G)
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10:
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903:Chikazumi, SĹŤshin (1997).
752:"Amorphous Magnetic Cores"
456:0.35 T (3,500 G)
384:anhysteretic magnetization
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1042:10.1080/00018735500101204
1006:10.1080/14786436608212648
905:Physics of Ferromagnetism
707:Jiles & Atherton 1986
663:McCurrie & Gaunt 1966
305:demagnetization remanence
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1124:10.1002/pssa.2211180133
865:1974E&PSL..23..177B
853:Earth Planet. Sci. Lett
464:Samarium-cobalt magnet
376:anhysteretic remanence
370:Anhysteretic remanence
167:
77:residual magnetization
42:remanent magnetization
1104:Physica Status Solidi
614:www.sciencedirect.com
130:
112:magnetic flux density
75:The equivalent term
1188:Computer engineering
1049:Nowicki, M. (2018).
1013:NĂ©el, Louis (1955).
957:J. Magn. Magn. Mater
255:Isothermal remanence
205:saturation remanence
123:Saturation remanence
60:) after an external
1198:Magnetic hysteresis
1145:1958JAP....29..595W
1116:1990PSSAR.118..295P
1067:2018Mate...11.2021N
1034:1955AdPhy...4..191N
998:1966PMag...13..567M
969:1986JMMM...61...48J
940:1969JAP....40.1297J
106:Sometimes the term
1076:10.3390/ma11102021
823:Electric Machinery
590:www.etymonline.com
417:. You can help by
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56:material (such as
46:residual magnetism
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833:978-0-07-366009-7
789:978-0-470-69516-6
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16:(Redirected from
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18:Retentivity
1182:Categories
1173:Magnet Man
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758:18 January
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595:2020-01-20
525:Hysteresis
520:Coercivity
394:in rocks.
364:anisotropy
172:saturation
163:coercivity
136:hysteresis
101:degaussing
89:generators
1055:Materials
1022:Adv. Phys
986:Phil. Mag
729:Jaep 1969
674:NĂ©el 1955
443:Remanence
334:magnitude
326:), where
149:remanence
38:Remanence
1095:30340358
514:See also
440:Material
398:Examples
147:denotes
1141:Bibcode
1112:Bibcode
1086:6213293
1063:Bibcode
1030:Bibcode
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332:is the
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132:Fig. 1
1018:(PDF)
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546:Notes
249:Tesla
118:Types
1091:PMID
913:ISBN
890:ISBN
828:ISBN
784:ISBN
760:2014
151:and
87:and
58:iron
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1120:doi
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1081:PMC
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1002:doi
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378:or
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