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Structure refinement, EPR, Specific magnetic heat and magnetic properties of ZnMnP2O7 diphosphate


 
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1. Title Title of document Structure refinement, EPR, Specific magnetic heat and magnetic properties of ZnMnP2O7 diphosphate
 
2. Creator Author's name, affiliation, country M. Bettach, Y. Ennaciri M. Touaiher, K. Benkhouja; UCD, Faculty of Sciences, LPCM, El Jadida, Morocco; Morocco
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) Diphosphate;Zinc; Manganese; Structure; Magnetism; EPR; specific heat .
 
4. Description Abstract

The structure of the diphosphate ZnMnP2O7 is determined on powder by the Rietveld method. It is of monoclinic symmetry C2/m. The cell parameters are: a = 6.6141(3) Å, b = 8.4366 (3) Å, c = 4.5305(2) Å and b= 103.948(2) °. The structural framework is built by MO6 octahedron planes where M is a mixed site statistically occupied by Zn2+ and Mn2+ ions. These planes are parallel to the crystallographic plane (001) and are linked together by sheets of P2O74- groups.The value of the paramagnetic temperature Qp is -4 K, which proves that the interactions are antiferromagnetic . The magnetic specific heat of this compound has a symmetric maximum at T = 5.3 K less acute compared to that of Mn2P2O7 of isotypic structure which is of ltype. This behavior change  can be explained by the interruption of three-dimensional interactions between Mn2+ ions which become limited to  2D order when 50% of these ions are replaced by Zn2+ ions.
 
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7. Date (YYYY-MM-DD) 24-03-2019
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://revues.imist.ma/index.php/morjchem/article/view/14618
 
10. Identifier Digital Object Identifier (DOI) https://doi.org/10.48317/IMIST.PRSM/morjchem-v7i2.14618
 
11. Source Title; vol., no. (year) Moroccan Journal of Chemistry; Vol 7, No 2 (2019)
 
12. Language English=en en
 
13. Relation Supp. Files Untitled (227KB)
 
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15. Rights Copyright and permissions Copyright (c) 2019 Moroccan Journal of Chemistry