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  • 11
    Electronic Resource
    Electronic Resource
    Magnetic properties of ultrathin NiFe and CoFe films (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 6618-6620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article, we report the magnetic properties of ultrathin (15–200 Å) NiFe and CoFe films deposited using ion beam deposition techniques. They are symmetrically sandwiched between Ta, Cu, or Ta/Cu under and capping layers. NiFe and CoFe films grown between Ta/Cu and Cu/Ta bilayers exhibit the smallest magnetic thickness loss of about 1 Å. This interfacial magnetic dead layer thickness, t0, is about 5 Å for Cu-sandwiched films and about 15 Å for Ta-sandwiched films. As the film thickness becomes thinner than 100 Å, the magnetic properties are found to be more sensitive to the choice of material and growth environment. CoFe films show an interfacial contribution, λi, about ten times larger than that for NiFe films. Among others, NiFe and CoFe films sandwiched by Ta/Cu and Cu/Ta bilayers exhibit the smallest values of λi. The magnetic anisotropy in Ta-sandwiched CoFe films appears to be predominantly magnetoelastic in nature. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372789
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  • 12
    Electronic Resource
    Electronic Resource
    Characterization of ion beam and magnetron sputtered thin Ta/NiFe films (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5780-5782 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin Ta/NiFe films were deposited using ion beam deposition (IBD), pulsed, and static magnetron sputtering techniques. These NiFe films show anisotropy field values ∼4 Oe, easy axis coercivities ≤1 Oe, and hard axis coercivities ≤0.3 Oe. IBD films exhibit higher magnetoresistance ratios (ΔR/R), while little difference is noted between different deposition techniques in the sheet resistance of NiFe films. A ΔR/R value of 1.8% has been measured for a 90 Å IBD NiFe films. X-ray diffraction measurements indicate that NiFe films of the same thickness have about the same grain size regardless of deposition technique, however, IBD films exhibit superior (111) texture and crystallinity. Our results clearly indicate that the superior magnetic properties of thin IBD Ta/NiFe films are a result of high crystallographic quality of these films. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370124
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  • 13
    Electronic Resource
    Electronic Resource
    Magnetic properties of ion beam deposited CoCrPt hard bias films for magnetoresistive heads (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5843-5845 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ion beam deposition techniques have been employed to prepare Cr/CoCrPt bilayers for hard bias applications in giant/anisotropic magnetoresistive recording heads. The bilayers were deposited at different deposition angles, which is defined as the angle between deposition beam direction and substrate plane. The magnetic properties of CoCrPt films, such as coercivity (Hc), remnant magnetization–thickness product (Mrt), and coercive squareness (S*) as a function of CoCrPt layer thickness and deposition angle have been studied and correlated to film microstructures. Typical values of Hc, Mrt, and S* for a Cr100 Å/CoCrPt490 Å bilayer deposited at 42° are 1580 Oe, 2.90 memu/cm2, and 0.90, respectively. The increase in Mrt with increasing CoCrPt layer thickness at a fixed deposition angle is accompanied by a linear decrease in Hc. We have observed, however, that for the same bilayer geometry both Hc and Mrt of CoCrPt layer increase with decreasing deposition angle, whereas S* remains almost unchanged. High angle x-ray diffraction measurements indicate that the hexagonal-close-packed (101¯0) crystallographic orientation of CoCrPt films is enhanced with decreasing deposition angles. This suggests that the improvement in both Mrt and Hc for CoCrPt films deposited with decreasing deposition angle results from an enhancement in in-plane c-axis texture, and crystallinity. This could be attributed to an enhancement in in-plane adatom mobility at low deposition angles. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369935
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  • 14
    Electronic Resource
    Electronic Resource
    Preparation of Y-Ba-Cu-O high Tc superconducting thin films by plasma-assisted organometallic chemical vapor deposition (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 194-196 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of the high Tc superconducting Y-Ba-Cu metal oxide have been prepared for the first time by plasma-assisted organometallic chemical vapor deposition using β-diketonate chelates of Y, Ba, and Cu, Y(C11H19O2)3, Ba(C11H19O2)2, and Cu(C11H19O2)2 as starting materials, followed by post-annealing under a reduced pressure of oxygen stream. X-ray diffraction spectra indicate that the films deposited on the yttria-stabilized zirconia (YSZ) substrate have a significant preferential orientation of the crystallite c axis being perpendicular to the substrate surface. Four-probe resistivity measurements reveal the temperature of the onset of superconductivity at 91.6 K and zero resistance by 78.5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102404
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  • 15
    Electronic Resource
    Electronic Resource
    Chemical Abstracts Service Chemical Registry System. 13. Enhanced handling of stereochemistry (1991)
    s.l. : American Chemical Society
    Journal of chemical information and modeling 31 (1991), S. 204-212 
    Details
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ci00002a005
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  • 16
    Electronic Resource
    Electronic Resource
    Evaluation of magnetic properties of CoZrCr for high speed write heads (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5998-6000 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The CoZrCr alloy has been developed for high speed write heads. This sputter deposited alloy exhibits soft magnetic properties and high resistivity which is suitable for high data rate write head applications. Resistivity of these sputtered films is about 90 μΩ cm, saturation magnetization is 13.6 kG, anisotropy field (Hk) is 15 Oe in as deposited state, which could be reduced to 5 Oe by annealing. Easy and hard axis coercivities are 〈0.2 and 〈0.3 Oe, respectively. Improved magnetic properties on sloped surfaces are observed for CoZrCr films, when deposited with 75 V substrate bias. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370016
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  • 17
    Electronic Resource
    Electronic Resource
    Spectroscopy and dynamics of fast evolving states (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 6763-6774 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100171a007
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  • 18
    Electronic Resource
    Electronic Resource
    Meiotic chromosome behaviour in an allotriploid derived from an amphidiploid × diploid mating in Cucumis (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A synthetic amphidiploid species Cucumis hyriviis Chen & Kirkbride (2n = 4x = 38; genome designated as HHCC) has recently been created from an interspecific mating between C. sativus L. (2n = 2x = 14: genome designated as CC) and C. hystrx. Chakr. (2n = 2x = 24; genome designated as HH). This amphidiploid is resistant to root knot nematode, tolerant to low irradiance, and has higher nutritional value than standard processing cucumber cultivars. An allotriploid (2n = 3x = 26; HCC) was derived from a cross between C. sativus L. and C. hytivus Chen & Kirkbride. Diploid meiotic behaviour in C. sativus and C. hystrix involves the development of seven and 12 metaphase bivalents respectively. In the derived allotriploid. univalents. bivalents, and trivalents (at relatively low frequency) were observed at metaphase I indicating that some homeologues from the C and H genomes can synapse. Based on a comparative karyotype analysis of cucumber (i.e. chromosome size and pairing behaviour) and aliotriploid plants, the seven bivalents observed at metaphase I were ascertained to be cucumber homologues, while the 12 univalents were of C. hystrix origin thus confirming the allotriploid karyotypic constitution to be HCC. On average, the frequency of trivalents was 0.24 at diakinesis and 0.22 in 100 meiocytes at metaphase I. indicating the possibility of genetic exchange due to the homoeology between the C and H genomes. After simultaneous cytokinesis, only polyads were observed in pollen mother cells (PMCs) at telophase II, which led to the production of sterile pollen grains. Multi-polarization of chromosomes was dominant at anaphase II. However. in about 20% PMCs. chromosomes separated to form a 7C + 1-2H complement, suggesting a possible method for the production of alien addition cucumber-C hystrix lines through further backcrossing of the allotriploid to diploid cucumber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2005.01066.x
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  • 19
    Electronic Resource
    Electronic Resource
    Assessment of genetic relationships among Cucumis spp. by SSR and RAPD marker analysis (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The first successful production of a sterile interspecific hybrid obtained from a cross between Cucumis hystrix Chakr. (2n = 2x = 24) and Cucumis sativus var. sativus L. (2n =2x = 14), and its subsequent fertility restoration through chromosome doubling provide an effective means for investigating genetic relationships among Cucumis spp. In this study, random amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers were used to investigate relationships among C. s. var. sativus L., C. s. var. hardwickii (R.) Alef., C hystrix, C. hytivus Chen & Kirkbride (the amphidiploid species from chromosome doubling of the C. sativus x C. hystrix interspecific hybrid, 2n = 38), C. melo (2n =2x = 24) and C. metuliferus Meyer and Naudin (2n =2x= 24). A total of 109 SSR bands and 398 RAPD primed sites were used to calculate Jaccard's distance coefficients for cluster analysis using a unweighted pair-group method using an arithmetic averaging (UPGMA) algorithm. The genetic relationships identified using SSR and RAPDmarkers were highly concordant, such that the correlation between SSR and RAPDgenetic distance (GD) estimates was r = 0.94. SSR and RAPDanalysis of 22 accessions allowed for their grouping into two distinct groups designated as CS and CM. While group CS consisted of 11 C. sativus genotypes, and the C. hytivus and C. hystrix accessions, group CM included six C. melo genotypes and C. metuliferus. The GD values between C. hystrix and C. sativus ascribed by SSR and RAPD matrices were 0.59 and 0.57, respectively. These GDs were smaller than those detected between C. hystrix and C melo (0.87 and 0.70 derived from SSR and RAPD markers, respectively).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00889.x
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  • 20
    Electronic Resource
    Electronic Resource
    Structure Elucidation of Crystalline Poly(diphenylsiloxane) (1995)
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 7370-7375 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00126a014
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