MnGa₂O₄ and Zn-doped MnGa₂O₄ 1-Dimensional Nanostructures

Abstract

Manganese gallium oxide (MnGa 2 O 4 ) one-dimensional nanostructures were synthesized by the thermal evaporation of MnCl 2 /Ga/Zn. The single-crystalline spinel-structured MnGa 2 O 4 nanowires are preferentially grown in the [111] direction. In contrast, the Zn (10%)-doped MnGa 2 O 4 nanostructures adopt zigzag structures. Some of them are nanosprings that consist of four equivalent [011] growth directions with the axial [001] direction. The nanobelts often have two zigzagged [011] directions along the long axis parallel to the [112] direction. We discuss the growth model of these unique zigzagged nanostructures. The MnGa 2 O 4 nanostructures exhibit the emission at 2.5 eV (7 K), which possibly originated from the d-d transition of the tetrahedrally coordinated Mn 2+ ions, and the decreased intensity with the Zn doping. The magnetization measurements indicate that these MnGa 2 O 4 nanostructures exhibit virtually paramagnetic behaviors.

Influence of growth temperature on the morphology and luminescence of Ga2O3:Mn nanowires

“…3b, which corresponds to the microcrystals shown in Fig. 2c, shows two main peaks around 708 and 653 cm À1 , which agree well with the main peaks reported for MnGa 2 O 4 spinel structure [14]. Several much weaker peaks can be observed, at 200, 346, 416, and 765 cm À1 , which are assigned to b-Ga 2 O 3 from the substrate pellet.…”

Compressibility and structural stability of spinel-type MnIn2O4

“…Surprisingly, limited information is available about Mn 2 þ -M(IIIA) spinels (M(IIIA) ¼Ga 3 þ , Al 3 þ and In 3 þ ), those capable for cooperative paramagnetic and spin-liquid behavior. Among these spinels, MnAl 2 O 4 is the most studied one [17][18][19][20][21], for MnGa 2 O 4 a number of controversial results are reported [22][23][24][25][26] and the properties of MnIn 2 O 4 are addressed in only one study [27].…”

Low temperature synthesis of nanocrystalline MnIn2O4 spinel

“…Among these spinels, MnAl 2 O 4 is the most studied one. [5][6][7][8][9] For MnGa 2 O 4 a number of controversial results was reported [10][11][12][13][14] and the properties of MnIn 2 O 4 still remain unexplored.…”