Spin-glass state in nanoparticulate (La0.7Sr0.3MnO3)(1-x) (BaTiO3)(x) solid solutions: Experimental and density-functional studies
Data(s) |
2016
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Resumo |
We report the transition from robust ferromagnetism to a spin- glass state in nanoparticulate La0.7Sr0.3MnO3 through solid solution with BaTiO3. The field- and temperature-dependent magnetization and the frequency-dependent ac magnetic susceptibility measurements strongly indicate the existence of a spin- glass state in the system, which is further confirmed from memory effect measurements. The breaking of long-range ordering into short-range magnetic domains is further investigated using density-functional calculations. We show that Ti ions remain magnetically inactive due to insufficient electron leakage from La0.7Sr0.3MnO3 to the otherwise unoccupied Ti-d states. This results in the absence of a Mn-Ti-Mn spin exchange interaction and hence the breaking of the long-range ordering. Total-energy calculations suggest that the segregation of nonmagnetic Ti ions leads to the formation of short-range ferromagnetic Mn domains. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/53590/1/Phy_Rev-B_93-9_094401_2016.pdf Nayek, Chiranjib and Samanta, S and Manna, Kaustuv and Pokle, A and Nanda, BRK and Kumar, Anil PS and Murugavel, P (2016) Spin-glass state in nanoparticulate (La0.7Sr0.3MnO3)(1-x) (BaTiO3)(x) solid solutions: Experimental and density-functional studies. In: PHYSICAL REVIEW B, 93 (9). |
Publicador |
AMER PHYSICAL SOC |
Relação |
http://dx.doi.org/10.1103/PhysRevB.93.094401 http://eprints.iisc.ernet.in/53590/ |
Palavras-Chave | #Physics |
Tipo |
Journal Article PeerReviewed |