Strained Structure in Ho0.5Sr0.5MnO3 |
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| Authors: | C AutretC Martin A MaignanM Hervieu B RaveauG André F Bourée |
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| Institution: | a Laboratoire CRISMAT, ISMRA et Université de Caen, CNRS UMR 6508, 6, boulevard Maréchal Juin, 14050, Caen, Franceb LLB(CEA-CNRS), CEA/Saclay, 91191, Gif-sur-Yvette Cedex, Francef1Christine.martin@ismra.frf1 |
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| Abstract: | The Ho0.5Sr0.5MnO3 perovskite, synthesized in air, has been studied by combining neutron powder and electron diffraction techniques. The Pnma-type structure exhibits a strong tilting of the MnO6 octahedra. This octahedra tilting and microtwinning involve a complex strained structure. No structural transition is observed down to 1.4 K, but short-range A-type antiferromagnetism running over only a few perovskite subcells is evidenced below ≈90 K. The different behavior of this perovskite compared to other Ln0.5Sr0.5MnO3 perovskites is discussed in terms of A-site cationic mismatch. |
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| Keywords: | manganites electron microscopy X-ray diffraction neutron diffraction magnetic properties transport properties |
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