AC susceptibility and temperature modulation studies of gadolinium near the Curie point

Sydney, K. R.; Chaplin, D. H.; Wilson, G. V. H.

doi:10.1016/0304-8853(76)90046-9

Cited by 18 publications

(2 citation statements)

References 14 publications

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“…In the small signal regime, an AC magnetization M ac = χH ac is induced by an alternating field, where χ is a susceptibility tensor. In bulk magnetic systems, low frequency susceptibility (including the use of higher order susceptibility 4,5 ) measurements are used extensively to monitor myriad phenomena from the onset of ferromagnetism at the Curie temperature 6,7 , magnetization reversal processes in thin films 8,9 and patterned nanostructures 10 , exchange anisotropy in exchange biased systems 11 , and dynamics in spin-glass systems 12 . The advantages offered by nanomechanical transduction have yet to be fully exploited for magnetic susceptibility measurements.…”

mentioning

confidence: 99%

Nanomechanical AC susceptometry of an individual mesoscopic ferrimagnet

Losby

Diao

Sani

et al. 2014

Solid State Communications

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A novel method for simultaneous detection of both DC and time-dependent magnetic signatures in individual mesoscopic structures has emerged from early studies in spin mechanics. Multifrequency nanomechanical detection of AC susceptibility and its harmonics highlights reversible nonlinearities in the magnetization response of a single yttrium iron garnet (YIG) element, separating them from hysteretic jumps in the DC magnetization.

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mentioning

confidence: 99%

Nanomechanical AC susceptometry of an individual mesoscopic ferrimagnet

Losby

Diao

Sani

et al. 2014

Solid State Communications

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“…We conclude that the domain properties responsible for these effects relax very slowly at the Curie point where nucleation is commencing, with much faster relaxation at lower temperatures. Full details of the modulation and susceptibility measurements for gadolinium are being published elsewhere (Sydney et al 1976).…”

Section: Dg/dt = -{G(t)-ge(t)}/tmentioning

confidence: 99%

Theory of Temperature Modulation Studies of Ferromagnetic Materials

Wilson¹,

Chaplin²,

Sydney³

1976

Aust. J. Phys.

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A theoretical account is given of temperature modulation experiments on a ferromagnet sample in which the resulting voltage induced in a pick-up coil is monitored by phase-sensitive detection. Calculations are made of the effects of magnetic relaxation and of the thermal skin depth on the signal amplitude and phase. The relaxation calculations are shown to be consistent with recent experimental data for gadolinium.,

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Temperature modulation and temperature hysteresis studies of dysprosium

McKenna

Campbell

Chaplin

et al. 1983

Phys. Stat. Sol. (a)

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Temperature modulation studies of the magnetic susceptibility of polycrystalline dysprosium are compared with measurements of minor loop temperature hysteresis of susceptibility in both the ferromagnetic and the spiral spin antiferromagnetic regions. The effects of temperature hysteresis upon susceptibility in the ferromagnetic and antiferromagnetic regions, and the intermediate region which links them, are examined.Temperaturmodulationsuntersuchungen der magnetischen Suszeptibilitlit von polykristallinem Dysprosium werden mit Messungen der kleineren Temperatur-Hystereseschleifen der Suszeptibilitat sowohl in ferromagnetischen als auch im antiferromagnetischen Spiral-Spin-Bereich verglichen. Die Einfliisse der Temperaturhysterese auf die Suszeptibilitiit im ferromagnetischen und antiferroma.gnetischen Bereich und dem Zwischenbereich, der beide verbindet, werden untersucht.Recently we reported ac susceptibility and transient enhancement (TE) studies of polycrystalline gadolinium [4, 51, dysprosium [6] and of a terbium single crystal [7]. T E measurements, wherein a second ac (or pulsed dc) field is applied a t afrequency differing from the primary, was shown to be a sensitive indicator of the presence of domain wall pinning with the enhanced susceptibility being caused by the freeing of the walls by the second field [5]. For gadolinium, T E studies indicate the nucleation of the ferromagnetic walls a t the Curie temperature, T,, and their presence a t lower t,emperatures. For terbium and dysprosiuni the TE studies indicate not only the presence of ferromagnetic domain walls below T, but also the formation, via an interl) Duntroon, ACT 2600 New South Wales, Australia. z, P. 0. Box 4, Canberra, ACT 2600, Australia.

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AC susceptibility and temperature modulation studies of gadolinium near the Curie point

Cited by 18 publications

References 14 publications

Nanomechanical AC susceptometry of an individual mesoscopic ferrimagnet

Nanomechanical AC susceptometry of an individual mesoscopic ferrimagnet

Theory of Temperature Modulation Studies of Ferromagnetic Materials

Temperature modulation and temperature hysteresis studies of dysprosium

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