Discontinuous evolution of the highly distorted orthorhombic structure and the magnetic order in LaMnO3±δ perovskite
Journal of Solid State Chemistry, 1999•Elsevier
In this work we present a systematic study of the crystallographic structure and the magnetic
ordering of LaMnO3±δ perovskites. Changing the oxygen composition within the range
2.995< 3±δ< 3.140, we found a 3+ δ1 value (3.04< 3+ δ1< 3.05) which defines a boundary
in the magnetic phase diagram T vs 3±δ. For 3+ δ< 3+ δ1, antiferromagnetic order is present
in the samples with a small ferromagnetic component, while for large 3+ δ values (3+ δ> 3+
δ1) the samples are ferromagnetic. The transition from one region to the other is associated …
ordering of LaMnO3±δ perovskites. Changing the oxygen composition within the range
2.995< 3±δ< 3.140, we found a 3+ δ1 value (3.04< 3+ δ1< 3.05) which defines a boundary
in the magnetic phase diagram T vs 3±δ. For 3+ δ< 3+ δ1, antiferromagnetic order is present
in the samples with a small ferromagnetic component, while for large 3+ δ values (3+ δ> 3+
δ1) the samples are ferromagnetic. The transition from one region to the other is associated …
In this work we present a systematic study of the crystallographic structure and the magnetic ordering of LaMnO3±δ perovskites. Changing the oxygen composition within the range 2.995<3±δ<3.140, we found a 3+δ1 value (3.04<3+δ1<3.05) which defines a boundary in the magnetic phase diagram T vs 3±δ. For 3+δ<3+δ1, antiferromagnetic order is present in the samples with a small ferromagnetic component, while for large 3+δ values (3+δ>3+δ1) the samples are ferromagnetic. The transition from one region to the other is associated with a change in volume of around 1%.
Elsevier
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