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Saturation (magnetic)

About: Saturation (magnetic) is a research topic. Over the lifetime, 11228 publications have been published within this topic receiving 189507 citations. The topic is also known as: saturation.


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Journal ArticleDOI
TL;DR: In this paper, the authors reported giant values of saturation magnetoresistance in sputtered antiferromagnetic Co/Cu multilayers containing thin Co and Cu layers 8-10 A.
Abstract: We report giant values of saturation magnetoresistance in sputtered antiferromagnetic Co/Cu multilayers containing thin Co and Cu layers 8–10 A thick. We discuss the key importance of the buffer layer in controlling the growth of flat Co and Cu layers. As shown by cross‐section transmission electron microscopy high‐quality structures are found for growth on Fe buffer layers. Such structures display saturation magnetoresistance at 300 K of more than 65% with saturation fields of ≂10 kOe. These values are several times larger than previously found for any magnetic material at room temperature.

537 citations

Journal ArticleDOI
TL;DR: In this paper, a new perpendicular magnetic recording system is proposed for high density recording, which uses the perpendicular magnetization mode which is basically free from the demagnetization in very high densities.
Abstract: By the analysis of the self-consistent magnetization and the direct observation of the remanent magnetization of a real tape, the authors discussed the obstacles which are, and will be, encountered in attaining a higher recording densities with the present magnetic recording system, which uses mainly a longitudinal magnetization mode. Then the properties of the three magnetization modes (longitudinal, circular, and perpendicular) are compared. The mode transformation is also discussed. Finally a new perpendicular magnetic recording system is proposed for high density recording. And some results of fundamental experiments are presented. The system uses the perpendicular magnetization mode which is basically free from the demagnetization in very high densities. Its realization mainly owes to the development of a perpendicular anisotropy film and perpendicular magnetic heads.

463 citations

Journal ArticleDOI
TL;DR: In this paper, devitrified glassy FeCuNbSiB alloys are used to reveal a homogeneous ultrafme grain structure of bcc-FeSi with grain sizes of typically 10-15nm and random texture.

452 citations

Journal ArticleDOI
TL;DR: In this paper, a data set of room temperature magnetic parameters for several iron oxides and sulphides was compiled from the available literature, and the most effective methods for assessing mineralogy, concentration and domain state within environmental magnetic studies were proposed.
Abstract: A data set of room temperature magnetic parameters for several iron oxides and sulphides was compiled from the available literature. The aim was to propose the most effective methods for assessing mineralogy, concentration and domain state within environmental magnetic studies. Establishing the magnetic mineralogy is essential for a correct interpretation of concentration and grain-size indicative parameters. Hematite and in particular goethite are recognised by their high (remanent) coercivities. The ratio of saturation remanent magnetisation to susceptibility is suited for assessing mineralogy; for low coercivity minerals, high values of the ratio are indicative of pyrrhotite. Greigite and maghemite both have intermediate ratios, while very low values suggest the presence of (titano)magnetite. From the concentration-dependent parameters mass specific susceptibility, saturation remanent magnetisation and susceptibility of anhysteretic remanent magnetisation, susceptibility displayed the least grain-size dependence. Therefore, it is perhaps the best indicator of concentration, under the proviso of uniform mineralogy and when paramagnetic and diamagnetic contributions are taken into consideration. All minerals showed a decrease in coercivity and remanence ratios with increasing grain size for sizes larger than one micrometer. In contrast, the coercivity of goethite showed an increase with grain size. Assessment of domain state was complicated by very small and large grains displaying similar magnetic properties.

430 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that errors in the extracted orbital moment values due to saturation effects can be in excess of 100% and even yield the wrong sign for films as thin as 50 \AA{}.
Abstract: Saturation effects are determined in x-ray magnetic circular dichroism spectra, acquired by electron yield techniques. It is shown that sum-rule extraction of the number of d holes, orbital moment, and spin moment are affected for Fe, Co, and Ni. In particular, errors in the extracted orbital moment values due to saturation effects can be in excess of 100% and even yield the wrong sign for films as thin as 50 \AA{}. They are significant even for film thicknesses of a few monolayers. Errors for the derived values for the number of d holes and the spin moment are considerably smaller but may be of the order 10--20 %. Correction factors are given for quantities obtained from sum rule analysis of electron yield data of Fe, Co, and Ni as a function of film thickness and x-ray incidence angle.

425 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202213
2021219
2020303
2019272
2018335
2017382