Autor: Bednarcik, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetic Properties of Crystalline NiFe Alloy Prepared by High-Energy Ball Milling and Compacting
Autorzy:: Olekšáková, D.
Kollár, P.
Füzer, J.
Bednarčík, J.
Roth, S.
Powiązania:: https://bibliotekanauki.pl/articles/1533970.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Bb
81.20.Wk
75.50.Vv
75.60.Ej
75.60.-d
Opis:: The structure and magnetic properties of compacted microcrystalline NiFe (81 wt% of Ni) powder is investigated. The powder of NiFe alloy prepared by ball milling of ribbon (prepared by melt spinning) remains single phase material suitable for compaction in order to prepare soft magnetic material. The bulk samples were consolidated by uniaxial compaction of the powder in vacuum. By measuring of AC and DC magnetic properties it was found out that in bulk samples the displacement of domain walls is the dominant magnetization process, while rotation of magnetization vectors prevails in powder material.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 797-799
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Magnetic Properties of Fe@Pt Nanoparticles with Core/Shell Morphology
Autorzy:: Zeleňáková, A.
Zeleňák, V.
Bednarčík, J.
Lauda, M.
Kováč, J.
Powiązania:: https://bibliotekanauki.pl/articles/1535141.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.75.Fk
75.50.Vv
75.40.Gb
Opis:: We have investigated the magnetic properties of iron nanoparticles coated by platinum shell prepared by chemical procedure. Magnetic measurements using SQUID magnetometer confirm the behaviour typical for a superparamagnetic system. From the M(H) loop at 300 K the magnetic moment of each particle $m_{P}$ ≈ $250 μ_{B}$ was calculated. The magnetic relaxation study by the in-phase χ' and out-of-phase χ" ac susceptibilities in frequency range 0.1-1000 Hz suggests the existence of two magnetic layers with different magnetic spin's dynamics and strong dipolar interactions between nanoparticles. The observed magnetic behaviour is caused by the blocking process of interacting superparamagnetic particles with magnetic iron core, diamagnetic platinum shell and spin-glass like behaviour magnetic interlayer between them.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 1002-1004
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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