The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films | Zendy

S. Venkatesh | Zendy; Abdulaziz Baras | Zendy; J.-S. Lee | Zendy; Iman S. Roqan | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films

Author(s) -

S. Venkatesh,

Abdulaziz Baras,

J.-S. Lee,

Iman S. Roqan

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4944954

Subject(s) - superparamagnetism , condensed matter physics , polaron , magnetoresistance , ferromagnetism , colossal magnetoresistance , variable range hopping , materials science , magnetic semiconductor , doping , metal–insulator transition , magnetization , giant magnetoresistance , metal , thermal conduction , electron , magnetic field , physics , quantum mechanics , metallurgy , composite material

We studied the nature of magnetic ordering in Mn-doped ZnO thin films that exhibited ferromagnetism at 300 K and superparamagnetism at 5 K. We directly inter-related the magnetisation and magnetoresistance by invoking the polaron percolation theory and variable range of hopping conduction below the metal-to-insulator transition. By obtaining a qualitative agreement between these two models, we attribute the ferromagnetism to the s-d exchange-induced spin splitting that was indicated by large positive magnetoresistance (∼40 %). Low temperature superparamagnetism was attributed to the localization of carriers and non-interacting polaron clusters. This analysis can assist in understanding the presence or absence of ferromagnetism in doped/un-doped ZnO

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research