Cu  1– x  Fe  x  O: hopping transport and ferromagnetism | Zendy

Mohammad Nasir | Zendy; Rakibul Islam | Zendy; Md. A. Ahmed | Zendy; Saniya Ayaz | Zendy; Gautham Kumar | Zendy; Sunil Kumar | Zendy; C.L. Prajapat | Zendy; Frédérick Roussel | Zendy; Sajal Biring | Zendy; Somaditya Sen | Zendy

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Cu _{1– x} Fe _x O: hopping transport and ferromagnetism

Author(s) -

Mohammad Nasir,

Rakibul Islam,

Md. A. Ahmed,

Saniya Ayaz,

Gautham Kumar,

Sunil Kumar,

C.L. Prajapat,

Frédérick Roussel,

Sajal Biring,

Somaditya Sen

Publication year - 2017

Publication title -

royal society open science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.84

H-Index - 51

ISSN - 2054-5703

DOI - 10.1098/rsos.170339

Subject(s) - ferromagnetism , x ray photoelectron spectroscopy , materials science , doping , coercivity , electrical resistivity and conductivity , impurity , condensed matter physics , dielectric , phase (matter) , analytical chemistry (journal) , crystallography , nuclear magnetic resonance , chemistry , physics , optoelectronics , organic chemistry , quantum mechanics , chromatography

Single phase, sol–gel prepared Cu 1 –x Fe x O (0 ≤ x ≤ 0.125) powders are characterized in terms of structural, electronic and magnetic properties. Using dielectric and magnetic studies we investigate the coupling of electron and spin. The electrical conductivities and activation energies are studied with increasing Fe content. Modelling of experimental conductivity data emphasizes a single hopping mechanism for all samples except x = 0.125, which have two activation energies. Hole doping is confirmed by confirming a majority Fe 3+ substitution of Cu 2+ in CuO from X-ray photoelectron spectroscopy studies (XPS). Such a substitution results in stabilized ferromagnetism. Fe substitution introduces variation in coercivity as an intrinsic magnetic property in Fe-doped CuO, and not as a secondary impurity phase.

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