Influence of epitaxial strain on clustering of iron inPb(Fe1/2Nb1/2)O3

Magnetoelectric effect in antiferromagnetic multiferroic Pb(Fe1/2Nb1/2Laguta1, Stephanovich2, Raevski3 et al. 2017Phys. Rev. BSelf Cite400121View full textAdd to dashboardCite

“…The latter effect could be attractive for spintronic and ME random access memory applications as ME coupling offers an elegant way of electric filed control and switching of AFM domains. It is worth noting that though the Neel temperature of PFN (≈ 150 K) is well below the room temperature, it can be increased substantially by mechanical activation of precursors used for ceramics sintering [29] and by strain engineering in epitaxial nanofilms [30,31].…”

“…Poled samples were tested by measuring the piezoelectric coefficient, d 31 , by the standard resonanceantiresonance method.…”

Mössbauer and magnetization studies of magnetic phase transitions in 0.5BiFeO3–0.5NaNbO3 and 0.5LaFeO3–0.5NaNbO3 solid solutions

“…24,26 It is known that in complex perovskites, macroscopic structure differs greatly from the local one, as is evidenced by the studies of the nuclear magnetic resonance (NMR), 27 fine structure of Xray absorption spectra (XAFS), 28 acoustic emission, 29,30 magnetization measurements, 31 as well as the results of ab initio calculations. 32 The experimentally observed significant (up to 70 K) increase in T M values in PFN epitaxial nanofilms 33 and in mechanochemically synthesized PFN and PFT ceramics 34 is attributed to the changes in the degree of local ordering (clustering) of Fe 3þ and Nb 5þ (Ta 5þ ) ions. 32,34 It is worth noting that the effect of local ordering of Fe 3þ and Nb 5þ ions was also observed in the BiFeO 3 -PFN solid solution.…”

“…32 The experimentally observed significant (up to 70 K) increase in T M values in PFN epitaxial nanofilms 33 and in mechanochemically synthesized PFN and PFT ceramics 34 is attributed to the changes in the degree of local ordering (clustering) of Fe 3þ and Nb 5þ (Ta 5þ ) ions. 32,34 It is worth noting that the effect of local ordering of Fe 3þ and Nb 5þ ions was also observed in the BiFeO 3 -PFN solid solution. 26 Previously, we found out that dilution of Pb-sublattice in PFN by nonmagnetic ions caused a dramatic lowering of T M and transformation of the long-range antiferromagnetic order into a spin-glass one, though the concentration of iron in the B-sublattice remained the same.…”

Cluster Superconductivity in the Magnetoelectric Pb(Fe1/2Sb1/2)O3 Ceramics

“…Here we report the first time observation of local superconductivity in the magnetoelectric Pb(Fe 1/2 Sb 1/2 )O 3 (PFS). This material possesses both magnetism and ferroelectricity like other much more known chemically disordered double perovskites PbFe 1/2 Nb 1/2 O 3 (PFN) and PbFe 1/2 Ta 1/2 O 3 (PFT) [9][10][11][12][13][14][15][16][17]. PFS shows quite intriguing magnetic properties such as existence of dynamic magnetic nanoregions with large frustrated magnetic superspins, which on cooling freeze in superspin glass state coexisting with the long-range ordered antiferromagnetic (AFM) phase at T < 32 K [9].…”