Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-07-07
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, accepted for publication in Physical Review B
Scientific paper
Muon spin relaxation measurements are reported on samples of dimethylammonium metal formates containing magnetic divalent nickel, cobalt, manganese, and copper ions. These hybrid organic-inorganic perovskites exhibit weak ferromagnetism and are, apart from the copper system, multiferroics with well separated magnetic and antiferroelectric transitions. We use muons to follow the sublattice magnetization, observing the effect of the spin reorientation transitions below TN and the criticality approaching TN. The multiferroic samples have three-dimensional antiferromagnetic interactions, but the copper sample shows quasi-one-dimensional behavior due to its Jahn-Teller distorted structure, with a ratio of its inter- and intrachain exchange constants j/J=0.037.
Baker Peter J.
Blundell Stephen J.
Franke Isabel
Hayes Wayne
Jain Piyush
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