High-resolution hard x-ray photoemission investigation ofLa2−2xSr1+2xMn2O7(0.30≤x<0.50): Microscopic phase separation and surface electronic structure of a bilayer colossal magnetoresistance manganite

2009/03/21 by S. de Jong, Freek Massee, F. Massee +11
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Cleavage (geology) #Condensed matter physics #Crystallography #Curie #Curie temperature #Doping #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Manganite #Materials science #Physics #Rare-earth and actinide compounds #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.80.205108

7 pages, 5 figures

arxiv created 2009/03/21 · openalex publication_date 2009/11/09 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Photoemission data taken with hard x-ray radiation on cleaved single crystals of the bilayered, colossal magnetoresistant manganite La_2\ensuremath-2xSr_1+2xMn₂O₇ (LSMO) with 0.30\ensuremath≤x&lt;0.50 are presented. Making use of the increased bulk sensitivity upon hard x-ray excitation it is shown that the core-level footprint of the electronic structure of the LSMO cleavage surface is identical to that of the bulk. Furthermore, by comparing the core-level shift of the different elements as a function of doping level x, it is shown that microscopic phase separation is unlikely to occur for this particular manganite well above the Curie temperature.

Citations

• Giant negative magnetoresistance in perovskitelikeLa2/3Ba1/3MnOxferromagnetic films
• Interplay of spin and orbital ordering in the layered colossal magnetoresistance manganiteLa2−2xSr1+2xMn2O7(0.5<~x<~1.0)
• Fermi Surface Nesting and Nanoscale Fluctuating Charge/Orbital Ordering in Colossal Magnetoresistive Oxides