An automatic system for the measurement of magnetic after-effects

Klugmann, E.

doi:10.1088/0022-3735/13/5/008

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…On cooling down, we find some characteristic modifications in the susceptibility curve as compared to that obtained on heating up (Fig. 3): a) The martensitic p --f c1 back-transformation sets in with a first peak at 690 K, whose amplitude decreases only slowly, evidently due to the narrow superposition of a second peak, located at 663 K. A similar superposition of two closely spaced susceptibility maxima has also previously been observed in polycrystalline Co [25]. On further cooling down from the temperature range of this second peak, the susceptibility decays rapidly, attaining a minimum at about 625 K. b) Upon cooling still further, the xb curve again rises steeply, in order to reach a further maximum at about 570 K, i.e.…”

Section: Initial Susceptibilitysupporting

confidence: 76%

Investigation of thermomagnetic effects in monocrystalline cobalt near the martensitic phase transition

Klugmann¹,

Blythe

Walz

1994

Phys. Stat. Sol. (a)

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The initial susceptibility and the magnetic after‐effect (MAE) of [0001]‐oriented, prismatic cobalt single crystals are investigated in the temperature range 100 K < T < 800 K using ac techniques. The amplitudes of both the susceptibility and the MAE are characteristically influenced by the temperature‐dependent variations of the crystal anisotropy constants, K1 and K2, and by magnetostrictive interactions with dislocations and point defects. It is shown that the concentration of these intrinsic defects may be increased considerably by continued annealing in the vicinity of the allotropic α → β phase transformation.

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Section: Initial Susceptibilitysupporting

confidence: 76%

Investigation of thermomagnetic effects in monocrystalline cobalt near the martensitic phase transition

Klugmann¹,

Blythe

Walz

1994

Phys. Stat. Sol. (a)

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“…1 ). The time and temperature dependence of the complex permeability and loss angle have been measured with an automated inductance bridge system[2] ,seen onFig.1, atfrequencies 0.5, 1 and 2 kHz in low measuring fields ( amplidute of 8,24, and 48 A/m ). The Maxwell-Bridge…”

mentioning

confidence: 99%

Influence of ion implantation on permeability disaccommodation and magnetic losses of cobalt

Klugmann

1994

IEEE Trans. Magn.

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Effect of nitrogen and oxygen ion implantation (80 keV) on thin polycrystalline cobalt wire have been studied on the basis ofresidual lossangleandmagneticafter-effect measurements from 300 K to 450 K , using an automated Maxwell bridge. On a strongly temperature-dependent residual loss angle curve, after oxygen ion implantation ( dose 1019 m-2), an additionalradiation maximum at 350 K occurs , which might be attributed to a relaxation effect due to a reorientational or migrational motion of interstitial atoms.

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An automated technique for the measurement of the AC initial susceptibility and its disaccommodation in ferromagnetic materials

Blythe¹

1985

phys. stat. sol. (a)

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A fully automated technique is described for the measurement of the complex initial susceptibility and its time and temperature dependence in ferromagnetic materials. The method, which is a differential one employing phase sensitive detection, enables both components of the complex susceptibility to be determined simultaneously and has, as an illustration, been applied to an investigation of the magnetic relaxation of C interstitially dissolved in a-Fe. It is concluded that at the frequency of measurement (1 kHz) the modulus of the complex susceptibility and the real components supply essentially the same information. The temperature dependence of the initial susceptibility o f a single crystal of cobalt is also measured.Eine vollkommen automat,isierte Methode fur die Messung der komplexen Anfangssuszeptibilitiit und ihre Zeit-und Temperaturabhangigkeit in ferromagnetischen Stoffen wird beschrieben. Die Methode, die differentiell ist, benutzt einen phasenempfindlichen Gleichrichter und ermiiglicht, beide Komponenten der komplexen Suszeptibilitat zu messen. Zur Veranschaulichung wird die Nethode zur Untersuchung der magnetischen Relaxation von interstitiell gelosten C in a-Fe angewandt. Es ergibt sich, daD bei der Frequenz der Messungen (1 kHz) der Betrag der komplexen Suszeptibilitat und auch die reale Komponente im wesentlichen dieselbe Information geben. Die Temperaturabhangigkeit der Anfangssuszeptibilitat eines Kobalteinkristalls wird ebenfalls gemessen.

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An automatic system for the measurement of magnetic after-effects

Cited by 4 publications

References 6 publications

Investigation of thermomagnetic effects in monocrystalline cobalt near the martensitic phase transition

Investigation of thermomagnetic effects in monocrystalline cobalt near the martensitic phase transition

Influence of ion implantation on permeability disaccommodation and magnetic losses of cobalt

An automated technique for the measurement of the AC initial susceptibility and its disaccommodation in ferromagnetic materials

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