Non-adiabatic small polaron hopping in the n = 3 ruddlesden-popper compound Ca4Mn3O10

Lago, J, Battle, PD, Rosseinsky, MJ ORCID: 0000-0002-1910-2483, Coldea, AI and Singleton, J (2003) Non-adiabatic small polaron hopping in the n = 3 ruddlesden-popper compound Ca4Mn3O10 Journal of Physics Condensed Matter, 15 (40). pp. 6817-6833. ISSN 0953-8984, 1361-648X

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Abstract

Magnetotransport properties of the compound Ca<inf>4</inf>Mn<inf>3</inf> O<inf>10</inf> are interpreted in terms of activated hopping of small magnetic polarons in the non-adiabatic regime. Polarons are most probably formed around Mn³⁺ sites created by oxygen sub-stoichiometry. The application of an external field reduces the size of the magnetic contribution to the hopping barrier and thus produces an increase in the conductivity. We argue that the change in the effective activation energy around T<inf>N</inf> is due to the crossover to variable range hopping conduction as antiferromagnetic order sets in.

Item Type:	Article
Additional Information:	29 pages, 7 figures
Uncontrolled Keywords:	cond-mat.mtrl-sci, cond-mat.mtrl-sci
Depositing User:	Symplectic Admin
Date Deposited:	02 Aug 2016 13:47
Last Modified:	21 Apr 2026 23:05
DOI:	10.1088/0953-8984/15/40/018
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002647
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