Controlled exchange bias behavior of manganese nanoparticles

TitleControlled exchange bias behavior of manganese nanoparticles
Publication TypeJournal Article
Year of Publication2022
AuthorsTiwari, G, C. Vinod, P, Jagirdar, BR
JournalJournal of Magnetism and Magnetic Materials
Date PublishedOCT
Type of ArticleArticle
KeywordsAntiferromagnetism, exchange bias, Ferromagnetism, Manganese nanoparticles, Uncompensated spins

Mn(0) colloids were synthesized by solvated metal atom dispersion approach utilizing hexadecylamine, toluene, and THF as coordinating ligands. Mn-toluene and Mn-THF nanoparticles were found to be highly pyrophoric in nature and demand careful handling whereas, Mn-HDA nanoparticles undergo slow oxidation. TEM micrographs revealed formation of nanoparticles between 3 and 6 nm. Magnetic studies of these three samples displayed shift in the field-cooled M-H hysteresis loop which has been attributed to exchange bias behavior. The exchange bias field, HE measured at 5 K varies with change in coordinating ligands around the Mn center which are 1217 Oe, 4408 Oe and, 6350 Oe for Mn-HDA, Mn-toluene and Mn-THF nanoparticles, respectively. The large exchange bias field has been attributed to the presence of uncompensated antiferromagnetic surface spins and the exchange interactions at the nanoparticle surface due to surface oxidation.

Type of Journal (Indian or Foreign)


Impact Factor (IF)


Divison category: 
Catalysis and Inorganic Chemistry
Web of Science (WoS)

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