Synthesis, crystal structure, and magnetic properties of oxynitride perovskites SrMn0.2M0.8O2.6N0.4 (M = Nb, Ta)

2020 ◽  
Vol 49 (19) ◽  
pp. 6471-6477
Author(s):  
Young-Il Kim ◽  
Maxim Avdeev

Oxynitride perovskites with octahedral Mn2+ display a paramagnetic behavior and an unusual lattice distortion.

2015 ◽  
Vol 804 ◽  
pp. 38-41
Author(s):  
Pattarinee Klumdoung ◽  
Piyapong Pankaew

In present study, the Co0.7Zn0.3Fe2O4 ceramic was prepared using solid state reaction. The crystal structure of prepared ceramic indicated as solid solution. The SEM result indicated the dense structure of prepared ceramic as increased sintering temperature. For VSM result of Co0.7Zn0.3Fe2O4 ceramic indicated the super paramagnetic behavior with high magnetization. These results could lead us to the development of Co0.7Zn0.3Fe2O4 ceramic preparation optimized for specific applications.


2012 ◽  
Vol 67 (8) ◽  
pp. 759-764 ◽  
Author(s):  
Dilahan Aydin-Cantürk ◽  
Hanne Nuss Max-Planck

The new compound [Cr3(dpa)4Cl2][CuCl2] (1) (dpa = di-2,2'-pyridylamido) was synthesized by reacting Cr2(dpa)4 and anhydrous CuCl2 in dry tetrahydrofuran. Partial oxidation of Cr2(dpa)4 by Cu(II) forms Cr3+ ions, which coordinate to the free N donor atoms of the dpa ligands, and led to the formation of a trinuclear chain cation [Cr3(dpa)4Cl2]+. Recrystallization from CH2Cl2/ethyl ether yielded dark-brown, block-shaped crystals suitable for X-ray structure determination (Pccn (no. 56), a=1246:8(5), b=1487:3(3), c=2184:8(1) pm, V =4051.6(8) ·106 pm3, Z =4). The crystal structure is composed of discrete [Cr3(dpa)4Cl2]+ cations and [CuCl2]- anions. The Cr3 chain comprises quadruply-bonded diamagnetic (Cr2)4+ dimers and a pseudo-octahedrally coordinated, paramagnetic Cr3+ ion, manifesting itself in the effective magnetic moment μeff of 3:54μB (d3, S = 3=2) and the almost ideal Curie-paramagnetic behavior observed between 2 and 300 K with a Weiss constant θ = -0:25(4)K and χ0 = 4:9(7)×10-4 emu mol-1


2011 ◽  
Vol 509 (17) ◽  
pp. 5200-5205 ◽  
Author(s):  
H. Michor ◽  
G. Hilscher ◽  
O. Myakush ◽  
N. Pyk ◽  
P. Myronenko ◽  
...  

2008 ◽  
Vol 361 (9-10) ◽  
pp. 2747-2758 ◽  
Author(s):  
Jayanthi Narayanan ◽  
Alejandro Solano-Peralta ◽  
Víctor Manuel Ugalde-Saldivar ◽  
Roberto Escudero ◽  
Herbert Höpfl ◽  
...  

Author(s):  
Shohei Yamamoto ◽  
Ryoji Mitsuhashi ◽  
Masahiro Mikuriya ◽  
Masayuki Koikawa ◽  
Hiroshi Sakiyama

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