Novel methods for the fabrication of ferromagnetic nickel and nickel boride thin films
Metal‐rich nickel boride thin films fabricated from boron‐containing precursor compounds by a cluster deposition process are shown to be ferromagnetic. The metal‐rich films fabricated by this approach exhibit hysteresis curves similar to those obtained for pure nickel foils. These films are a mixture of pure nickel and the Ni3B nickel boride phases. It is postulated that the hysteresis curves with smaller remnant magnetizations obtained from these films are a consequence of Ni3B inclusions within the films. Other novel organometallic source compounds for nickel chemical‐vapor deposition are briefly reviewed.
Verschiedenartige Koordinationen bei ?2-Alken)-(?5-cyclopentadienyl)organylnickel(II)-Komplexen
Various Coordinations in (η2-Alkene)(η5-cyclopentadienyl)organylnickel(II) Complexes 
 
 
 
A series of (η2-alkene)(η5-cyclopentadienyl)organylnickel(II) complexes with substituted cyclopentadienyl ligands is synthesized in order to compare the structures, the thermal stabilities, and chemical reactivities. In (allyl)(η5-Cp')Ni compounds the allyl moiety is η3-coordinated when Cp'=C5H5, C5Me5 (1), C5Ph5 (2), indenyl (3), [Hydridotri(pyrazolyl)borato] (4) (as an equivalent of the cyclopentadienyl ligand), and [C5H4((CH2)3CHCH2)] (22). It is found that the [(η2-alkene)alkyl(η5-Cp')nickel] compounds [Cp'=C5Me5; alkeneC2H4, alkyl=Me (10), Et (9) or alkene=(1 – 2-η2)-1,3-butadiene, alkyl=Me (11); Cp'=C5Ph5; alkene=C2H4, alkyl=Me (12)] are thermally more stable and less reactive than their η5;- C5H5 analogues; the largest increase in thermal stability is observed when the η5-Cp' and the η2-alkene functions are connected by substitution of the cyclopentadienyl ligand with an alkenyl group of suitable chain length. In the case of compounds of the general type [(η5-C5R4((CH2)nCHCH2))-(ligand)Ni(II)] with Ph3P as the ligand these complexes are cationic [RH, n=3 (14+) or RMe, n=2 (17+)]. On the other hand, the compounds with anionic ligands are neutral complexes (RH, n=3, ligand=methyl (19), ethyl (20), isopropyl (21) or RMe, n=3 and ligand=iodide (24), bromide (25), methyl (26), ethyl (27)]. In 14+, 17+, 19 – 21 and 24 – 27 the CC bond of the alkenyl group is η2-coordinated to the nickel atom. X-ray structures have been determined for 4 and 25.
Investigating the Optical properties of cd1-xznxs thin films deposited by the Dip Technique
A Thesis submitted to the Department of Physics, Kwame Nkrumah University of Science and Technology, in partial fulfillment of the requirement for the degree of 
Master of Science (Solid State Physics)