Phase separation of the spin system in the La0.93Sr0.07MnO3 crystal |
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Authors: | S. F. Dubunin V. E. Arkhipov S. G. Teploukhov V. D. Parkhomenko N. N. Loshkareva N. I. Solin |
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Affiliation: | (1) Institute of Metal Physics, Ural Division, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Yekaterinburg, 620219, Russia |
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Abstract: | The magnetic state of the manganite La0.93Sr0.07MnO3 in the range 4.2–290 K was studied using elastic neutron scattering. The magnetic state of this compound was found to occupy a particular place in the La1?xSrxMnO3 solid-solution system, in which the antiferromagnetic type of order (LaMnO3, TN=139.5 K) switches to ferromagnetic ordering (La0.9Sr0.1MnO3, TC=152 K) with increasing x. In the transition state, this compound contains large-scale spin configurations of two types. A fractional crystal volume of about 10% is occupied by regions of the ferromagnetic phase with an average linear size of 200 Å, while the remainder of the crystal is a phase with a nonuniform canted magnetic structure. Arguments are presented for the phase separation of the La0.93Sr0.07MnO3 spin system being accounted for by Mn4+ ion ordering. |
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