American Journal of Applied Scientific Research

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: Aug. 29, 2019
    Accepted: Sep. 19, 2019
    Published: Oct. 14, 2019
    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
  • 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: Jul. 25, 2019
    Accepted: Aug. 13, 2019
    Published: Nov. 04, 2019
    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