Comparative Study of the Layered Perovskites Pr1−xA1+xCoO4, (A = Sr, Ca). Issue 11 (4th August 2014)

• Record Type: Journal Article
• Authors: Hassen, Arafa; Krimmel, Alexander; Mandal, Prabhat; Damjanovic, D.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 11(2014)
• Page Start: 3609
• Page End: 3614
• Publication Date: 2014-08-04
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13172
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13172-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>We present structural, magnetic, and electric properties of Pr_{1−<italic>x</italic>}Ca_{1+<italic>x</italic>}CoO₄ layered perovskites and compare them with the results of recently studied Pr_{1−<italic>x</italic>}Sr_{1+<italic>x</italic>}CoO₄. The Rietveld refinements of X‐ray powder diffraction (XRD) patterns indicate that all samples crystallize in the K₂NiF₄‐type structure with space group symmetry <italic>I</italic>4/<italic>mmm</italic>. The parent compounds Pr(Ca, Sr)CoO₄ are paramagnetic insulators. Upon increasing <italic>x</italic>, a variety of different magnetic transitions can be identified. The complex magnetic behavior results from the interplay of competing interactions. The temperature‐dependent electrical resistivity of the samples shows 2D variable range hopping (2D‐VRH). The results are discussed with respect to structure−property relationships.</p> </abstract>