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Document type:
Zeitschriftenaufsatz 
Author(s):
Gattermann, U.; Park, S. -H.; Paulmann, C.; Benka, G.; Pfleiderer, C. 
Title:
{{HT}}-Solution Growth and Characterisation of {{InxNaxMn1}}-{{2xWO4}} (0 
Abstract:
A new solid solution system, InxNaxMn1\textendash{}2xWO4 (0$<$x=$\leq$0.26) belonging to the MnWO4-type multiferroics was investigated. Large single crystals were grown up to several mm in length from high-temperature oxide solutions using a solvent mixture of Na2WO4 and Na2W2O7. Quantitative doping degrees were analyzed by means of electron microprobe. Single crystal X-ray diffraction studies agreed with the polar space group P2 for InxNaxMn1\textendash{}2xWO4. The complexity of partial (Na+/Mn2+)- and (In3+/Mn2+)-ordering makes their atomic sites unique, explaining the dissymmetrization from P2/c down to P2. This is also valid for the InNaW2O8-type Mn2yIn1-yNa1-yW2O8 solid solution found as co-product in this study. Specific heat and magnetisation measurements showed a paramagnetic dilution effect from (In3+/Na+)-doping while lowering the transition temperature for the multiferroic phase AF2 of InxNaxMn1\textendash{}2xWO4 with respect to the prototype MnWO4. 
Keywords:
(In/Na)-doping,Magnetization,MnWO,Multiferroics,Polar structure,X-ray diffraction 
Journal title:
Journal of Solid State Chemistry 
Year:
2016 
Journal volume:
244 
Month:
dec 
Pages contribution:
140 
Print-ISSN:
0022-4596