Wroclaw University of Technology De Gruyter Open Materials Science
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The section contains back issues papers
of Materials Science-Poland.


Large Magnetocaloric Effect in Perovskite Manganites: MagneticEntropy Changes Above 300 K

Manh-Huong Phan1, Seong-Cho Yu1, A.N. Ulyanov1,2 and H.K. Lachowicz3
Department of Physics, Chungbuk National University, Cheongju, Korea
Donetsk Physico-Technical Institute of National Academy of Sciences, Donetsk, Ukraine
Institute of Physics, Polish Academy of Science, Warszawa, Poland

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Micromagnetic Simulation of Multiphase Nanocrystalline Material with Different Boundary Conditions

O. Nedelko1, A. ¦lawska-Waniewska1, Y. Labaye2
1Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
2Laboratoire de Physique de l'Etat Condensé, Université du Maine, Mans, France

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The Effect of Underlayers on Grain Orientation and Magnetic Properties of Barium-ferrite Thin Film

Dong Hyoun Kim1, In Tak Nam1, Yang Ki Hong2
1Kangwon National University, Chunchon, Korea
2University of Idaho, Moscow, USA

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The Effect of Axial Dc-field on Transverse Permeability in Co-based Metallic Glass Ribbons

H. K. Lachowicz1, M. KuĽmiński1, Seong-Cho Yu2
1Institute of Physics, Polish Academy of Sciences, Warszawa, Poland
2Department of Physics, Chungbuk National University, Chongju, Korea

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Effective Magnetostriction in Nanocrystalline Alloys

A. ¦lawska-Waniewska
Institute of Physics, Polish Academy of Sciences, Warszawa, Poland

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Magnetometry of Monoatomic Layers and Spin Electronics Elements

J. Wrona, T. Stobiecki, M. Czapkiewicz, R. Rak
Department of Electronics, University of Mining and Metallurgy, Kraków, Poland

Abstract

In this paper, two magnetometers: resonance vibrating sample magnetometer (R-VSM) and magnetooptical Kerr effect magnetometer (MOKE) designed for hysteresis loop measurements of ultra-thin films and spintronics elements are described. Both instruments have been built by the first author of this paper in the Department of Electronics. The measuring head of R-VSM is universal and could work in the Helmholtz coils as well as in an electromagnet. The frequency of R-VSM is about 75 Hz. Test measurements on MgO(001)/Fe(4, 3, and 2ML)/50ÅCr samples were performed and the sensitivity was estimated as 10-5 emu. The MOKE system with differential amplifier (in contrast to lock-in detection technique) is especially recommended for rapid measurements up to 1.5 kHz. The calibration of the Kerr rotation angle was performed on the standard Fe sputtered films (with thickness from 2 nm to 50 nm) and Fe-wedge sample, prepared by MBE-technique, with the range of thickness from 1ML to 50 ML of Fe. On the base of measurement of 2, 3, 4, 5, 7 ML of Fe, the angle resolution of Kerr rotation was estimated as 0.001 min. The example measurement of hysteresis loop on the spin valve structure Si (100)Ta(52Å)/Co(44Å)/Cu(22Å)/Co(44Å)/ FeMn(100Å)/ Ta(52Å) is demonstrated.

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Magnetic Properties of Fe/Si and Co/Si Multilayers

T. Luciński1, M. Kopcewicz2, A. Hütten3, H. Brückl3, S. Heitmann3, T. Hempel3 and G. Reiss3
1Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland
2Institute of Electronic Materials Technology, Warsaw, Poland
3Faculty of Physics, University of Bielefeld, Bielefeld, Germany

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Magnetic Properties of the RMn12-xTx Alloys in High Magnetic Field #

W. Suski1,2, B. Belan3, A. Gilewski1, T. Mydlarz1, K. Wochowski2
1International Laboraratory of High Magnetic Fields and Low Temperatures, Wrocław, Poland
2Polish Academy of Science, W.Trzebiatowski Institute of Low Temperature and Structure Research, Wrocław, Poland
3Department of Inorganic Chemistry, Ivan Franko National University of L'viv, L'viv, Ukraine

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Exchange Coupling Field in Top, Bottom, and Dual Type IrMn Spin Valves Coupled to CoFe

J. Y. Hwang and J. R. Rhee
Department of Physics, Sookmyung Women's University, Korea

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Effects of an External Magnetic Field on the Perpendicular Magnetic Anisotropy of Electrodeposited Micro-patterned Arrays

W. Y. Jeung, D. H. Choi, and K. H. Lee
Metal Processing Research Center, Korea Institute of Science and Technology, Seoul, Korea,

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Rotational Anisotropy in Exchange-biased NiFe/FeMn Bilayers

Do-Guwn Hwang
Department of Computer and Electronic Physics, Sangji University, Korea

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Structure Analysis and Local Magnetic Parameters of Magnetoresistance Tunnel Junctions

Cheol Gi Kim1, Chong-Oh Kim,1, Yongkang Hua1, J. Kanak2, T. Stobiecki,2, S. Ogata,3, M. Tsunoda3 and M. Takahashi3
1Department of Materials Engineering, Chungnam National University, Taejon, Korea
2 Department of Electronics, University of Mining and Metallurgy, Krakow, Poland
3Department of Electronic Engineering, Tohoku University, Sendai, Japan

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Magnetism of Nanocrystalline and Bulk FexNi23-xB6 (x=0, 1, 22 and 23) Alloys -- Experiment and Theory

B. Idzikowski and A. Szajek
Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland

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Microstructure and Magnetic Properties of NdFeB Magnets Fabricated by Current-Applied Pressure-Assisted Process

Y.B. Kim1, H.T. Kim1,S.H. Cho1,2, G.A. Kapustin3
1Korea Research Institute of Standards and Science, Korea
2Chungnam National University, Korea
3Kurchatov Institute, Russia

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Influence of In Dilution Level on Magnetic Mroperties and Photoconductivity of Cd1-yCr2-2xIn2x+ySe4 Magnetic Semiconductors

B.T. Cięciwa, L. J. Maksymowicz, M. Lubecka, H. Jankowski, J. Sokulski, Z. Sobków
Department of Electronics, University of Mining and Metallurgy, Kraków, Poland

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High Frequency Magneto-Impedance Effect in Glass-Coated Amorphous Co83.2 B3.3 Si5.9 Mn7.6 Microwires

Heebok Lee2, Yong-Seok Kim1, Seong-Cho Yu2
1Department of Physics Education, Kongju National University, Kongju, Korea
2Department of Physics Chungbuk National University, Chongju, Korea

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