Synthesis, structures and magnetic properties of n=3 Ruddlesden-Popper compounds Ca{sub 4}Mn{sub 3-x}Ta{sub x}O{sub 10} (0<=x<=0.3)

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.12.001· OSTI ID:21372538

Ping, Chai ^[1]; Xiaojuan, Liu ^[1]; Yao, Liu ^[1]; Minfeng, Lv ^[1]

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1. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

The structural and magnetic properties of Ta-doped Ca{sub 4}Mn{sub 3-x}Ta{sub x}O{sub 10} (0<=x<=0.3) compounds have been investigated. Structural refinement indicates that the Ta doping maintains the orthorhombic layered perovskite structure with space group Pbca as Ca{sub 4}Mn{sub 3}O{sub 10} but induces an increase in both unit cell volume and octahedral distortion. The magnetization measurements reveal that the magnetization first increases and reaches to maximum for the x=0.1 sample and then gradually decreases with the increase of Ta content. There appear short-range ferromagnetic (FM) clusters in all the doped samples, which are caused by the double-exchange interaction between Mn{sup 4+} and Mn{sup 3+} that is induced by the charge compensation effect. As x is higher than 0.1, the overall results show evidence for the gradual appearance of a cluster glass behavior. When x increases to 0.3, the long-range antiferromagnetic (AFM) ground state is melted into the short-range magnetically ordered regions due to the increase of Ta{sup 5+} and Mn{sup 3+} at the expense of Mn{sup 4+}. The competition between AFM regions and FM clusters makes the short-range magnetic components frustrate when the temperature falls to a frustrating point, and thus cluster glass transition occurs. - Graphical Abstract: The magnetic structures of Ca{sub 4}Mn{sub 3-x}Ta{sub x}O{sub 10} transit from G-type AFM to cluster glass state with the intermediate state of FM clusters exhibited in AFM matrix as Ta increasing.

• OSTI ID: 21372538
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 3; Other Information: DOI: 10.1016/j.jssc.2009.12.001; PII: S0022-4596(09)00564-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
CALCIUM COMPOUNDS
DOPED MATERIALS
EXCHANGE INTERACTIONS
FERROMAGNETISM
GLASS
GROUND STATES
INTERMEDIATE STATE
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE COMPOUNDS
MANGANESE IONS
ORTHORHOMBIC LATTICES
OXIDES
PEROVSKITE
SPACE GROUPS
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM IONS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ENERGY LEVELS
INTERACTIONS
IONS
MAGNETISM
MATERIALS
MINERALS
OXIDE MINERALS
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SYMMETRY GROUPS
TRANSITION ELEMENT COMPOUNDS