J. Phys.: Condens. Matter 10 No 45 (16 November 1998) L727-L735

LETTER TO THE EDITOR

 

Physical properties of the n =3 Ruddlesden - Popper compound Ca4Mn 3O10

A I Mihut-+, L E Spring-+, R I Bewley-+, S J Blundell-+, W Hayes-+, Th Jestädt-+, B W Lovett-+, R McDonald-+, F L Pratt-+, J Singleton-+, P D Battle++, J Lago++, M J Rosseinsky++ and J F Vente++
-+ Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
++ Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK

 Received 25 August 1998

 Abstract. We present the results of a combined magnetization, muon-spin rotation, transport and magnetotransport study of the n = 3 Ruddlesden - Popper (RP) compound Ca4Mn 3O10. This compound adopts a layered structure in which groups of three perovskite layers alternate with single rock-salt layers. The muon-spin rotation data show that there is a sharp magnetic phase transition at 115 K. The resistance and magnetoresistance of the sample show no particular features at this temperature, but the transition affects the energy barriers associated with hopping transport. The magnetoresistance is proportional to the square of the magnetization, and is largest at low temperatures; a 40% drop in resistivity is observed in a magnetic field of 14 T at 61 K, much smaller than that measured in the related  RP (perovskite) manganites which exhibit colossal magnetoresistance (CMR).

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Thomas Jestädt, 1998. Back to publications.