2007/03/28 by X. Z. Yu, R. Mathieu, T. Arima +14
Materials Science · Physics and Astronomy · #Ferroelectric and Piezoelectric Materials #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.75.174441
published as Physical Review B 75, 174441 2007 · 12 pages, 5 figures
arxiv created 2007/03/28 · openalex publication_date 2007/05/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Structural features of the charge/orbital ordering (CO∕OO) in single-layered manganites Pr_1\ensuremath-xCa1+xMnO4 (0.3\ensuremath\leqslantx\ensuremath\leqslant0.65) have been investigated systematically by transmission electron microscopy. Analyses of electron-diffraction patterns as well as dark-field images have revealed that the CO∕OO shows a striking asymmetric behavior as the hole doping x deviates from x=0.5. The modulation wave number linearly decreases with increasing x in the over-hole-doped (x>0.5) crystals, while much less dependent on x in the under-hole-doped (x<0.5) crystals. A temperature-induced incommensurate-commensurate crossover is observed in 0.35<x<0.5 and x=0.65. The correlation length of CO∕OO in x=0.3 was proven to become shorter than that in 0.35\ensuremath\leqslantx\ensuremath\leqslant0.65