American Journal of Applied Scientific Research

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Volume 5, Issue 3, September 2019

  • Formation of Negative Ions on the Surface of a Solid Body and Their Influence on the Thermoelectronic and Autoelectronic Emission of Free Electrons

    Leonid Ivanovich Gretchikhin

    Issue: Volume 5, Issue 3, September 2019
    Pages: 47-55
    Received: 29 August 2019
    Accepted: 19 September 2019
    Published: 14 October 2019
    DOI: 10.11648/j.ajasr.20190503.11
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    Abstract: On the surface of the main crystal, positive ions interact with a negative cloud of free electrons and turn into neutral atoms. Neutral atoms having affinity to the electron other than zero additionally capture the electron and become negative ions. It is shown that under the action of ponderomotive forces the crystal surface is noticeably deformed... Show More
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  • A Theoretical Approach: Effects of Mn Substitution in Cobalt Ferrite

    Md. Ziaul Ahsan, Md. Aminul Islam

    Issue: Volume 5, Issue 3, September 2019
    Pages: 56-61
    Received: 25 July 2019
    Accepted: 13 August 2019
    Published: 4 November 2019
    DOI: 10.11648/j.ajasr.20190503.12
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    Abstract: This paper reports on the effect of Mn substitution in cobalt ferrite to explore the probable correlation among the structural, magnetic, and magneto-mechanical properties by a theoretical approach. Three compositions of Mn doped Cobalt ferrites at different Mn concentration (x) = 0.125, 0.25, 0.375, 0.5 have been undertaken for their analytical st... Show More
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