Switching mechanisms in cobalt-phosphorus thin films

Kelly, P. E.; O'Grady, K.; Mayo, P.I.; Chantrell, R.W.

doi:10.1109/20.42466

Cited by 746 publications

(297 citation statements)

References 5 publications

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“…10 Two different primary curves concerning the field dependence of the remanence were measured: 29 ͑1͒ the isothermal remanent magnetization curve m r (H)ϭM r (H)/M r (H max ), which was obtained measuring the remanence from the initially demagnetized state and taking the sample through progressively increasing loops; and ͑2͒ the dc demagnetizing remanence curve m d (H)ϭM d (H)/M d (H max ), which was obtained measuring the remanence by progressively increasing demagnetization in a previously saturated sample. Both remanence curves are expected to be related in noninteracting systems as 30 32 ⌬M Ͻ0 suggests that interactions are demagnetizing while ⌬M Ͼ0 suggests that interactions are magnetizing. The ⌬M plot ͑Fig.…”

Section: Magnetic Characterizationmentioning

confidence: 99%

Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites

1997

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The static and dynamic magnetic properties of nanocrystalline BaFe 10.4 Co 0.8 Ti 0.8 O 19 M -type doped barium ferrite were studied in detail to clarify the effect of interactions on the magnetic relaxation of an assembly of small particles. The logarithmic approximation was unable to account for the magnetic relaxation of the sample. Interaction effects were analyzed from the low-field susceptibility, ⌬M plots and the time dependence of thermoremanence, indicating that demagnetizing interactions led to an enhancement of both the relaxation rate at low temperatures and the amount of the lowest energy barriers. It is thus suggested that care should be taken when analyzing thermoremanent data at low temperature, in order not to confuse these experimental findings with the signature of macroscopic quantum tunneling. ͓S0163-1829͑97͒04709-7͔

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Section: Magnetic Characterizationmentioning

confidence: 99%

Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites

1997

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“…Interactions always exist between the nano magnetic materials, which will affect the properties of the materials and their applications, just like the decrease of squareness ratio (Mr/Ms) in nanowire arrays [16], the increase of media noise in magnetic recording materials [17] and so on. So it is important to study the interactions between the magnetic units in the arrays.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Interaction in FeCo Alloy Nanotube Array

Zhou¹,

Wang²,

Zhu³

et al. 2011

Journal of Magnetics

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An array of FeCo nanotubes has been successfully fabricated in the pores of porous anodic aluminum oxide (AAO) templates by wetting templates method. The morphology and structure of the nanotube array were characterized by scanning electron microscopy, transmission electron microscopy and x-ray diffraction. The average diameter of the nanotubes was about 200 nm, and the length was more than 10 µm. Vibrating sample magnetometer and superconducting quantum interference device were used to investigate the magnetic properties of the nanotube array. Interaction between the nanotubes has been found to be demagnetizing as expected and the switching field distribution is broad.

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“…The noninteracting case for ac or thermal demagnetized state corresponds to a linear Henkel plot with a slope of Ϫ2. In 1989, Kelly et al 6 have used the remanence curves to estimate interactions in granular thin films, due to the so-called ␦M plot, which is a direct measure of the deviation from the linearity;…”

Section: Introductionmentioning

confidence: 99%

Remanent magnetization plots of fine particles with competing cubic and uniaxial anisotropies

Geshev

Mikhov

Schmidt

1999

Journal of Applied Physics

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Magnetization and remanent magnetization curves for noninteracting single-domain particles whose anisotropy is made up of a cubic magnetocrystalline and an uniaxial components were investigated. For a given cubic anisotropy, the saturation remanence, coercivity, remanence coercivity, and coercivity factor values have been obtained for several different uniaxial anisotropy directions. The corresponding ␦M plots have been constructed for initially thermal or ac demagnetized systems, and a great variety of their shapes has been obtained when the uniaxial anisotropy does not dominate. Coercivity factor values rather higher than those for pure uniaxial or cubic anisotropy particles have been obtained as well, even for already dominating uniaxial anisotropy for some uniaxial anisotropy directions. Thus, it has been shown that one may not safely draw conclusions about interactions from deviations from the zero line in the ␦M plots or coercivity factor values for particles with competing anisotropies without specific analysis for any particular case.

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Switching mechanisms in cobalt-phosphorus thin films

Cited by 746 publications

References 5 publications

Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites

Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites

Magnetic Interaction in FeCo Alloy Nanotube Array

Remanent magnetization plots of fine particles with competing cubic and uniaxial anisotropies

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