High-Coercive Garnet Films for Imaging of Magnetic Recordings

Vishnevskii, V. G.; Nesteruk, A. G.; Nedviga, A. S.; Dubinko, S. V.; Prokopov, A. R.

doi:10.1166/sl.2007.023

Cited by 9 publications

(6 citation statements)

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“…It was caused by lattice mismatch stress and oxygen vacancies compensating the calcium anions in garnet films containing Ca. A high-coercive garnet film for imaging magnetic recordings was also developed [61].…”

Section: Coercivitymentioning

confidence: 99%

Coercive Properties of Magnetic Garnet Films

Vértesy

2023

Crystals

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Magnetic garnet films represent a wide family of materials. By the proper choice of chemical composition and growth parameters, their magnetic behavior can be tuned in a very wide range. On one side, they are suitable for many different applications; on the other side, they are optimal model materials for studying the basic magnetization processes. Many assumptions of the existing theories can be checked or validated by magnetic garnet film investigation. Their production technology was developed many decades ago, but even nowadays, magnetic garnet films have been intensively studied, and newer and newer application possibilities have been found. In this review paper, those results are summarized, which are connected with their coercive properties. Coercivity, or coercive force, is a frequently used magnetic characteristic, but usually, it is considered rather a technical parameter. It is shown that there is no correlation between the so-called “technical coercive force” (which is the half-width of a major hysteresis loop) and the domain wall coercivity (this is frequently called a domain wall pinning field). This latter parameter is considered a real characteristic of domain wall movement. If magnetic garnet films are investigated, the correlation between moving domain wall and material defect structure can be studied. In this paper, the very complex feature of coercivity is shown. It is demonstrated that the domain structure, the properties of domain walls, the existence of mechanical stresses, the temperature, the size of the sample and many other parameters have an influence on the measured coercivity.

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Section: Coercivitymentioning

confidence: 99%

Coercive Properties of Magnetic Garnet Films

Vértesy

2023

Crystals

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“…After mechanical polishing by diamond abrasives (up to * corresponding author; e-mail: roton@crimea.edu optical quality) and ion beam etching the thickness of GF was h = 1-2 µm. As a rule, this procedure slightly increases GF's coercivity [1,4].…”

Section: Preparation Of High-coercive Garnet Filmsmentioning

confidence: 99%

“…Contact printing technique is an effective tool [1] in forensic investigations. As a rule, it is expedient to decrease their Curie point (T C < 100…”

Section: Introductionmentioning

confidence: 99%

Layered Garnet Films for Applications in Atomic Traps

et al. 2010

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Layered high-coercive garnet films characterized by a couple of parameters very suitable for creating reconfigurable magnetic atomic traps with new properties are investigated. Non-uniform distribution of inner stresses and chemical composition stratification obtained in the films can be increased technologically to form sublayers for independent local switching by means of thermomagnetic recording. It makes possible to provide more than two magnetic states and create special types of atomic traps with additional "states of freedom". The experience in the films synthesis and experimental thermomagnetic recording for multilevel traps modeling is described.

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“…As the authors reported [1], using the films it was possible to restore partially loss data recorded on metallic tape of aircraft "black box" heated up to 500 °C after an airplane disaster. Due to the contact printing method very low levels (-55 dB and lower) of recording patterns stray fields can be observed.…”

Section: High-coercive Garnet Films Growthmentioning

confidence: 99%

“…It is known that uniaxial anisotropy high-coercive garnet films are an optimal media for thermomagnetic recording by different methods (electron or laser beams, contact printing). For example, contact printing magneto-optic (MO) transducers based on these films covered with composite mirror layer were effectively used by the authors [1] for phonoscopy examinations in criminalistics.…”

Section: Introductionmentioning

confidence: 99%

Garnet Films for Thermo-Magnetic Recording and Nanotechnology Purposes

Berzhansky

Nedviga

Vishnevskii

et al. 2009

SSP

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High coercive garnet-ferrite films are being synthesized for thermo-magnetic recording, for example, by focused laser beams. These films can be characterized by a couple of parameters very suitable for recording reconfigurable magnetic atomic traps whose geometry is visible. On the other hand, slightly other films can be used for contact printing of high density and weak residual magnetization records in criminalistics. Both types are investigated experimentally in this work.

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High-Coercive Garnet Films for Imaging of Magnetic Recordings

Cited by 9 publications

References 0 publications

Coercive Properties of Magnetic Garnet Films

Coercive Properties of Magnetic Garnet Films

Layered Garnet Films for Applications in Atomic Traps

Garnet Films for Thermo-Magnetic Recording and Nanotechnology Purposes

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