Two-dimensional C12Mn2/C12Cr2 as a room-temperature half metal/antiferromagnetic semiconductor: a systematic study

2017 ◽  
Vol 19 (4) ◽  
pp. 3394-3404 ◽  
Author(s):  
Zheng-Zhe Lin
Keyword(s):  
Systematic Study ◽  
Room Temperature ◽  
Neel Temperature ◽  
Two Dimensional ◽  
Néel Temperature ◽  
Half Metal

Two-dimensional C12Mn2/C12Cr2 as a half metal/antiferromagnetic semiconductor with high Curie/Néel temperature.

Conduction Characteristics of Charge Ordering Type Ferroelectrics,YFe2O4

2006 ◽  
Vol 966 ◽  
Author(s):  
Ken Imamura ◽  
Yoichi Horibe ◽  
Takeshi Yoshimura ◽  
Norifumi Fujimura ◽  
Shigeo Mori ◽  
...  
Keyword(s):  
Room Temperature ◽  
Inflection Point ◽  
Oxygen Deficiency ◽  
Complex Impedance ◽  
Charge Ordering ◽  
Neel Temperature ◽  
Ohmic Conduction ◽  
Néel Temperature ◽  
Impedance Measurements ◽  
Conduction Properties

ABSTRACTElectrical conduction properties of charge ordering type ferroelectrics YFe2O4 were investigated. YFe2O4 was synthesized in reduced atmosphere at 1200 °C. Oxygen partial pressure of the reduced atmosphere was controlled by the equilibrium state of CO and CO2. YFe2O4 is paramagnetic at room temperature and has Néel temperature around 250K. The Néel temperature was decreased with increasing the amount of oxygen deficiency. Moreover, YFe2O4 showed ohmic conduction from 260 to 100 K. The temperature dependence of the DC conductivity showed an inflection point at the Néel temperature, which indicated the development of charge ordering of Fe2+ and Fe3+ ions. From the complex impedance measurements, the equivalent circuits of YFe2O4 with different oxygen deficiency were determined at various temperatures.

Nonmonotonic field dependence of the Néel temperature in the quasi-two-dimensional magnet[Cu(HF2)(pyz)2]BF4

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
P. Sengupta ◽  
C. D. Batista ◽  
R. D. McDonald ◽  
S. Cox ◽  
J. Singleton ◽  
...  
Keyword(s):  
Field Dependence ◽  
Neel Temperature ◽  
Two Dimensional ◽  
Néel Temperature

scholarly journals Deformations of the α-Fe2O3 rhombohedral lattice across the Néel temperature

2017 ◽  
Vol 73 (1) ◽  
pp. 27-32 ◽  
Author(s):  
P. Fabrykiewicz ◽  
M. Stękiel ◽  
I. Sosnowska ◽  
R. Przeniosło
Keyword(s):  
Room Temperature ◽  
Chem Phys ◽  
Nanowire Growth ◽  
Neel Temperature ◽  
Néel Temperature ◽  
Monoclinic Symmetry ◽  
Model Calculations ◽  
Peak Broadening ◽  
Monoclinic Lattice ◽  
Diffraction Patterns

High-resolution synchrotron radiation powder diffraction patterns of α-Fe2O3 measured between room temperature and 1100 K, i.e. above the Néel temperature T N = 950 K, have been analyzed. The integral breadths of the Bragg peaks show a hkl-dependent anisotropy, both below and above T N. This anisotropy can be quantitatively described by using a statistical peak-broadening model [Stephens (1999). J. Appl. Cryst. 32, 281]. Model calculations show that the rhombohedral α-Fe2O3 lattice is deformed and the deformation leads to a monoclinic lattice with the unique monoclinic axis along the hexagonal [110] direction both below and above T N. The monoclinic symmetry of bulk α-Fe2O3 is compatible with α-Fe2O3 nanowire growth along the [110] direction reported in Fu et al. [Chem. Phys. Lett. (2001), 350, 491].

Novel two-dimensional CrXB2 (X=Cr, Ru) metal for high Néel temperature antiferromagnetic spintronics

2021 ◽  
pp. 122427
Author(s):  
Yusuf Zuntu Abdullahi ◽  
Zeynep Demir Vatansever ◽  
Ethem Aktürk ◽  
Ümit Akıncı ◽  
Olcay Üzengi Aktürk
Keyword(s):  
Neel Temperature ◽  
Two Dimensional ◽  
Néel Temperature
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