Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Materials Science Poland

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Study of ultrathin Co films grown on Si(111) substrates

Stupakiewicz A, Fleurence A, Gieniusz R, Maziewski A, Maroutian T, Gogol P, Bartenlian B, Mégy R, Beauvillain P

Materials Science Poland

2008

Vol. 26, No. 4

1021--1026

Ultrathin Co films were grown on vicinal Si(111) substrate with Cu buffer layers. Room temperature ferromagnetic behaviour of Co layer thicker than 4 monolayers was confirmed by the magneto-optical Kerr effect. Ferromagnetic resonance measurements have proven the coexistence of the magnetocrystalline anisotropy along with the growth- and vicinal induced uniaxial out-of-plane and in-plane contributions. Multi-jump hysteresis loops were observed for selected in-plane orientations of magnetic field which is explained by the competition of different anisotropy contributions.

Magnetic properties of ultrathin Co(0001) films on vicinal Si(111) substrate

Stupakiewicz A., Fleurence A., Gieniusz R., Maziewski A., Maroutian T., Gogol P., Bartenlian B., Mégy R., Beauvillain P.

Materials Science Poland

2008

Vol. 26, No. 2

295--300

In the present work we report on magnetization reversal process, anisotropy and domain structures in ultrathin Au/Co(0001)/Au films deposited on vicinal Si(111) substrates. The measurements were performed using a magneto-optical Kerr effect based magnetometer, a polarizing optical microscope and a ferromagnetic resonance spectrometer. Co thickness induced spin-reorientation from out-of-plane into in-plane magnetization was studied. Changes of in-plane magnetic anisotropy symmetry were deduced from shapes of magneto-optical hysteresis loops and from analysis of angular dependences of the resonance field. The experimental data have been discussed taking into account both uniaxial out-of-plane anisotropy and step-induced uniaxial in-plane anisotropy. A preferential orientation of domain walls in 3ML thick Co films was observed. The finding is explained by the step-induced magnetic anisotropy.

Magnetic ordering in ultrathin Co films grown on vicinal substrates

Stupakiewicz A., Gieniusz R., Postava K., Tekielak M., Maziewski A., Szerel I., Wawro A., Baczewski L.T.

Materials Science Poland

2006

Vol. 24, No. 3

659--664

The magnetic anisotropy of ultrathin Au/Co/Au magnetic films epitaxially grown on vicinal monocrystalline (11-20) sapphire substrates with different miscut angles covered with a Mo buffer are investigated by means of ferromagnetic resonance and magnetooptical techniques. Changes of in-plane magnetic anisotropy symmetry were deduced from shape analysis of the magnetization curves and angular dependence of the resonance field measured in the sample plane. Two-fold and four-fold symmetry was observed for different miscut angles. The preference of the domain wall orientation is observed. The experimental data are discussed taking into account the following energy contributions: (i) shape anisotropy; (ii) perpenducular uniaxial anisotropy; (iii) and step-induced uniaxial anisotropy.