Autor: Röll, K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Correlations of Mechanical Stresses and Magnetical Behaviour of Ion Implanted Magneto-Optical Layers
Autorzy:: Hubenthal, F.
Röll, K.
Powiązania:: https://bibliotekanauki.pl/articles/2013020.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.72.Ww
Opis:: Magneto-optical materials such as TbFeCo are used for data storage in a wide range. Especially the perpendicular magnetic anisotropy is necessary for high density recording. But the origin of the perpendicular magnetic anisotropy in these magneto-optical layers is not exactly known. In our experiments magneto-optical layers were implanted with heavy ions, with the aim to change the magnetic behaviour of these layers. After the implantation there is a dramatical change in the magnetical and mechanical behaviour, too.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 427-430
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Creation and Observation of Domain Structures with a Special Kerr Microscope
Autorzy:: Knappmann, S.
Röll, K.
Stobiecki, F.
Powiązania:: https://bibliotekanauki.pl/articles/2013069.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Kw
Opis:: A Kerr microscope is presented, which on the one hand allows us to make, in a conventional manner, images of domains in thin films with perpendicular magnetic anisotropy. On the other hand, it is possible to heat the sample locally by a focussed laser beam and make images simultaneously. Therefore, it is possible to write domains thermomagnetically and further to observe temperature dependent magnetic reorientations. For demonstration domains have been created thermomagnetically in TbFe multilayers. Writing with low magnetic field leads to domains with a subdomain structure, as it has been found previously by Lorentz microscopy.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 475-478
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Structure and Magnetic Properties of Ni/Ti Multilayers
Autorzy:: Szymański, B.
Stobiecki, F.
Otto, T.
Röll, K.
Powiązania:: https://bibliotekanauki.pl/articles/1953189.pdf
Data publikacji:: 1997-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Kj
75.70.-i
Opis:: We report a study of structure and magnetic properties of Ni/Ti multilayers with different modulation wavelength, 10 nm ≤ λ ≤ 40 nm, and constant sublayers thickness ratio d$\text{}_{Ni}$/d$\text{}_{Ti}$=1. Specimens were characterized with X-ray diffraction, vibrating sample magnetometer and torque meter in as-deposited state and in successive stages of isothermal annealing at 423 K. Hysteresis curves of as-deposited samples revealed the typical feature of ferromagnetic films with predominant shape anisotropy. During annealing very pronounced changes in the hysteresis loops were observed. An analysis of the loops indicates the occurrence of distinct changes in magnetic anisotropy of Ni sublayers: their effective shape anisotropy is drastically reduced due to a development of the perpendicular anisotropy and/or a modification of the microstructure. The effect can possibly be applied to achieve desirable variation of perpendicular anisotropy in multilayers which consist of Ni sublayers.
Źródło:: Acta Physica Polonica A; 1997, 91, 1; 233-236
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: High-Quality Ni-Fe/Cu Multilayer Films with Antiferromagnetic Coupling
Autorzy:: Stobiecki, F.
Dubowik, J.
Luciński, T.
Szymański, B.
Rohrmann, H.
Röll, K.
Schmidt, M.
Powiązania:: https://bibliotekanauki.pl/articles/1955455.pdf
Data publikacji:: 1997-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Tt
76.50.+g
Opis:: We report structural and magnetic properties of Ni$\text{}_{83}$Fe$\text{}_{17}$/Cu multilayer films with various buffer layer and sublayer thicknesses of copper d$\text{}_{Cu}$ and Permalloy d$\text{}_{Py}$ deposited by face-to-face sputtering. The following features prove a good quality of our films: a well-layered structure, complete antiferromagnetic coupling with a low coupling strength (2×10$\text{}^{-5}$ J/m$\text{}^{2}$ for d$\text{}_{Cu}$=1 nm and 10$\text{}^{-6}$ J/m$\text{}^{^2}$ for d$\text{}_{Cu}$=2.1 nm) and a low coercive field which make them attractive for possible applications as giant magnetoresistance sensors.
Źródło:: Acta Physica Polonica A; 1997, 91, 2; 277-280
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Temperature Dependence of Magnetisation Reversal and GMR in Spin Valve Structures
Autorzy:: Stobiecki, F.
Stobiecki, T.
Ocker, B.
Maass, W.
Powroźnik, W.
Paja, A.
Loch, C.
Röll, K.
Powiązania:: https://bibliotekanauki.pl/articles/2013156.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Pa
68.55.Ln
68.55.-a
Opis:: Temperature measurements of magnetisation reversal, resistance and magnetoresistance of Co/Cu/Co/FeMn spin valve structures deposited in different conditions were performed. The influence of exchange anisotropy energy, interlayer coupling energy, and electron transport properties were taken into consideration in explaining differences in giant magnetoresistance effect of investigated samples.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 523-526
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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