Size-dependent magnetic properties of cubic-phase MnSe nanospheres emitting blue-violet fluorescence. (23rd May 2018)

• Record Type: Journal Article
• Authors: Das, Kishan; AhmedMir, Irshad; Ranjan, Rahul; Bohidar, H B
• Is Part Of: Materials research express. Volume 5:Number 5(2018)
• Publication Date: 2018-05-23
• Subjects: MnSe nanosphere -- blue-violet fluorescence -- freezing temperature -- surface spins; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aac1ed
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: We report a facile controlled synthesis of non-iron based cubic phase MnSe magnetic nanocrystals with well-defined spherical shape of different size (7–16 nm, TEM data) by hot injection method without need for special conditions. It was found that the size and its polydispersity could be easily controlled by controlling the reaction temperature. The highly crystalline (confirmed by XRD) synthesized nanoparticles showed blue-violet fluorescence emission and were antiferromagnet in nature. The observed size dependent weak ferromagnetism, resulting hysteresis loop in antiferromagnet was attributed to the surface spins. Strengthening of antiferromagnetism with increasing size could be the reason for shifting of the freezing temperature towards higher side.