Magnetic compensation and critical behavior in spinel Co2TiO4

2020 ◽  
Vol 22 (36) ◽  
pp. 20929-20940
Author(s):  
Chaocheng Liu ◽  
Xucai Kan ◽  
Xiansong Liu ◽  
Zhitao Zhang ◽  
Jiyu Hu
Keyword(s):  
Critical Behavior ◽  
Spinel Structure ◽  
Magnetic Compensation ◽  
Compensation Behavior

The special magnetic compensation behavior in Co2TiO4 is closely related to its anomalous spinel structure.

scholarly journals Structure, magnetism, and magnetic compensation behavior of Co50-xMn25Ga25+x and Co50-xMn25+xGa25 Heusler alloys

2013 ◽  
Vol 113 (10) ◽  
pp. 103903 ◽  
Author(s):  
G. J. Li ◽  
E. K. Liu ◽  
Y. J. Zhang ◽  
Y. Du ◽  
H. W. Zhang ◽  
...  
Keyword(s):  
Heusler Alloys ◽  
Magnetic Compensation ◽  
Compensation Behavior

scholarly journals Repeated magnetic compensation behavior in the rare-earth alloyNd0.75Gd0.25Rh3B2with hexagonal structure and planar anisotropy

2008 ◽  
Vol 78 (6) ◽  
Author(s):  
Prasanna D. Kulkarni ◽  
U. V. Vaidya ◽  
V. C. Rakhecha ◽  
A. Thamizhavel ◽  
S. K. Dhar ◽  
...  
Keyword(s):  
Rare Earth ◽  
Hexagonal Structure ◽  
Planar Anisotropy ◽  
Magnetic Compensation ◽  
Compensation Behavior ◽  
The Rare Earth

Site occupancy in gamma alumina

1996 ◽  
Vol 54 ◽  
pp. 654-655
Author(s):  
C. A. Bateman ◽  
A.Z. Ringwelski ◽  
R.W. Broach
Keyword(s):  
Spinel Structure ◽  
Site Occupancy ◽  
Unit Cell ◽  
Neutron Diffraction Data ◽  
Gamma Alumina ◽  
Tetrahedral Sites ◽  
Powder Neutron Diffraction ◽  
Cation Sites ◽  
Powder Neutron Diffraction Data ◽  
Insufficient Number

Gamma (γ) alumina is referred to as a defect spinel because it has a tetragonally distorted spinel structure (AB2O4) and an insufficient number of cations to fill all cation sites. In the spinel structure, the oxygen lattice is cubic close packed with A- and B-site cations in tetrahedral and octahedral coordination, respectively. The 2l⅓ Al atoms per unit cell of γ alumina can distribute themselves across 16 octahedral and 8 tetrahedral sites.The literature differs on where the 2⅔ cation vacancies per unit cell are located. Wilson and McConnell proposed that the vacancies in γ alumina, as first formed by calcining boehmite, are predominantly on the tetrahedral lattice but, with further heat treatment, move to occupy random positions on both octahedral and tetrahedral lattices. One study using NMR showed that the vacancies lay exclusively on the tetrahedral lattice, independent of the calcination temperature. A more-recent study using Rietveld refinement of powder neutron diffraction data suggested that both octahedral and tetrahedral lattices were partially occupied.

A Review of Conformal Field Theory in 2D

2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1105
Author(s):  
Rahul Nigam
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Conformal Field Theory ◽  
Statistical Mechanics ◽  
Critical Behavior ◽  
Verma Module ◽  
Virasoro Algebra ◽  
Quantum Field ◽  
Conformal Field ◽  
Insight Into

In this review we study the elementary structure of Conformal Field Theory in which is a recipe for further studies of critical behavior of various systems in statistical mechanics and quantum field theory. We briefly review CFT in dimensions which plays a prominent role for example in the well-known duality AdS/CFT in string theory where the CFT lives on the AdS boundary. We also describe the mapping of the theory from the cylinder to a complex plane which will help us gain an insight into the process of radial quantization and radial ordering. Finally we will develop the representation of the Virasoro algebra which is the well-known "Verma module".  

Preparation and Characterization of Zn1-xNixFe2O4 Nanoparticles with Spinel Structure Synthesized by Hydrothermal Method

2018 ◽  
Vol 14 (6) ◽  
pp. 474-480 ◽  
Author(s):  
Xueliang Zhu ◽  
Zhiqiang Wei ◽  
Wenhua Zhao ◽  
Xu-dong Zhang ◽  
Xiao-juan Wu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Spinel Structure
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