Domain configurations and hysteresis behaviors of ultrathin cobalt film deposited on copper surface

Chan, Yuet-Loy; Jih, Nae-Yeou; Peng, Chih‐Wei; Chuang, Cheng‐Hao; Lee, T. H.; Huang, Jung-Chun Andrew; Hsu, Yao-Jane; Wei, Der-Hsin

doi:10.1016/j.jmmm.2006.10.1010

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…Samples F1 and F2 are expressively soft magnetic films, as the coercivities of the order of 50 Oe indicate. Similar results were already reported for fcc Co(0 0 1) epitaxially grown on fcc Cu(0 0 1) single crystals [6][7][8][9]30], which have a lattice parameter of 3.62Å, a value very close to that of bulk fcc Co (a misfit o2% compared with 16% between MgO and fcc Co). For Co films on MgO, the results available present coercivities between 100 and 400 Oe [20,21,24,26].…”

Section: Magnetic Propertiessupporting

confidence: 85%

“…Cu, ZnSe and GaAs are often used as substrates to grow the Co cubic phases, fcc in the case of Cu [6][7][8][9] and bcc in the other two cases [10][11][12][13]. Actually epitaxial thin films of such materials are not exactly cubic but tetragonal distorted structures (fct or bct), although the main magnetic aspects can be well described by models assuming cubic structures.…”

Section: Introductionmentioning

confidence: 99%

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Four-fold magnetic anisotropy in a Co film on MgO(001)

Pires

Cotta

Martins

et al. 2011

Journal of Magnetism and Magnetic Materials

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a b s t r a c tThe development of devices based on magnetic tunnel junctions has raised new interests on the structural and magnetic properties of the interface Co/MgO. In this context, we have grown ultrathin Co films ( r 30Å) by molecular-beam epitaxy on MgO(0 0 1) substrates kept at different temperatures (T S ). Their structural and magnetic properties were correlated and discussed in the context of distinct magnetic anisotropies for Co phases reported in the literature. The sample characterization has been done by reflection high energy electron diffraction, magneto-optical Kerr effect and ferromagnetic resonance. The main focus of the work is on a sample deposited at T S ¼ 25 1C, as its particular way of growth has enabled a bct Co structure to settle on the substrate, where it is not normally obtained without specific seed layers. This sample presented the best crystallinity, softer magnetic properties and a four-fold in-plane magnetic anisotropy with Co/1 1 0S easy directions. Concerning the samples prepared at T S ¼ 200 and 5001 C, they show fcc and polycrystalline structures, respectively and more intricate magnetic anisotropy patterns.

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