Effect of interlayer coupling on Néel, temperature in copper oxide based antiferromagnets

1995 ◽  
Vol 188 (2) ◽  
pp. 787-793 ◽  
Author(s):  
Ajay ◽  
S. Patra ◽  
R. S. Tripathi
Keyword(s):  
Copper Oxide ◽  
Interlayer Coupling ◽  
Neel Temperature ◽  
Néel Temperature

Preparation and Magnetism of CuO/A12O3 and CuO/MgO Artificial Superstructured Films

1991 ◽  
Vol 231 ◽  
Author(s):  
Mitsugu Sohma ◽  
Kenji Kawaguchi
Keyword(s):  
Magnetic Susceptibility ◽  
Copper Oxide ◽  
Vapor Deposition ◽  
Neel Temperature ◽  
Deposition Method ◽  
Néel Temperature ◽  
Mono Layer ◽  
Paramagnetic Contribution

AbstractThree kinds of copper oxide (CuO) films, that is, CuO mono-layer films (MLFs), CuO/A12O3 artificial superstructured films (ASFs) and CuO/MgO ASFs were prepared by a reactive vapor deposition method. Magnetic susceptibility of the MLFs is almost constant against temperature and the Neel temperature (TN) is a little lower than that of bulk CuO. There is paramagnetic contribution proportional to the number of the interfaces for both kinds of ASFs. It is considered to be caused by imperfect -Cu-O-Cu- antiferromagnetic superexchange interactions located in the vicinity of interfaces.

scholarly journals The Neel Temperature and Sublattice Magnetization for the Stacked Triangular-Lattice Antiferromagnet with a Weak Interlayer Coupling

2009 ◽  
Vol 152-153 ◽  
pp. 257-260 ◽  
Author(s):  
A.N. Ignatenko ◽  
Valentin Yu. Irkhin ◽  
A.A. Katanin
Keyword(s):  
Triangular Lattice ◽  
Nearest Neighbor ◽  
Interlayer Coupling ◽  
Neel Temperature ◽  
Heisenberg Antiferromagnet ◽  
Néel Temperature ◽  
Sublattice Magnetization ◽  
Weak Interlayer ◽  
Interlayer Exchange ◽  
Triangular Lattice Antiferromagnet

The quantum Heisenberg antiferromagnet on the stacked triangular lattice with the intralayer nearest-neighbor exchange interaction J and interlayer exchange J' is considered within the non-linear -model with the use of the renormalization group (RG) approach. For J'  J the asymptotic formula for the Neel temperature TNeel and sublattice magnetization are obtained. RG turns out to be insufficient to describe experimental data since it does not take into account the 2-vortices. Therefore TNeel is estimated using the Monte-Carlo result for the 2D correlation length [10] which has a Kosterlitz-type behavior near the temperature TKT where the vortices are activated.

The effect of high pressure on the Néel temperature of-manganese

1971 ◽  
Vol 47 (2) ◽  
pp. K99-K101 ◽  
Author(s):  
A. Sawaoka ◽  
T. Soma ◽  
S. Saito ◽  
Y. Endoh
Keyword(s):  
High Pressure ◽  
Neel Temperature ◽  
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.

Néel temperature of zinc-blende, MBE-grown MnTe layers: modification by the crystal growth conditions

2004 ◽  
Vol 1 (4) ◽  
pp. 953-956 ◽  
Author(s):  
W. Szuszkiewicz ◽  
E. Dynowska ◽  
J. Z. Domagala ◽  
E. Janik ◽  
E. Łusakowska ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Growth Conditions ◽  
Neel Temperature ◽  
Néel Temperature ◽  
Zinc Blende
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