Effect of Tb3+ doping in mixed-valence manganites and cobaltites. (30th August 2017)

• Record Type: Journal Article
• Authors: Knížek, K; Jirák, Z; Kaman, O; Maryško, M; Damay, F
• Is Part Of: Journal of physics. Volume 29:Number 40(2017)
• Publication Date: 2017-08-30
• Subjects: cobalt perovskite -- manganese perovskite -- neutron diffraction -- magnetic ordering -- Ising moments; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa7f1f
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The magnetic ordering of four Tb 3+ -doped manganites and cobaltites, La0.7 Tb0.1 Sr0.2 MnO3, La0.7 Tb0.1 Ca0.2 MnO3, La0.7 Tb0.1 Sr0.2 CoO3 and La0.7 Tb0.1 Ca0.2 CoO3, have been studied by means of neutron diffraction and SQUID magnetometry. All the samples were prepared by sintering of sol–gel precursors and their orthorhombic or rhombohedral perovskite structures at room and low temperatures were refined. A long-range ferromagnetic (FM) order was detected at the Mn and Co sites. In addition, a small but significant ordered moment was observed at A sites of studied cobaltites, which was attributed to local Tb 3+ moments, aligned by exchange interactions due to FM ordered Co sublattice. No or minor Tb 3+ contribution was detected in studied manganites.