Metallic ordered double-perovskite Sr2CrReO6 with maximal Curie temperature of 635 K

2002 ◽  
Vol 81 (2) ◽  
pp. 328-330 ◽  
Author(s):  
H. Kato ◽  
T. Okuda ◽  
Y. Okimoto ◽  
Y. Tomioka ◽  
Y. Takenoya ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Double Perovskite

A class of Pb-free double perovskite halide semiconductors with intrinsic ferromagnetism, large spin splitting and high Curie temperature

2018 ◽  
Vol 5 (5) ◽  
pp. 961-968 ◽  
Author(s):  
Bo Cai ◽  
Xi Chen ◽  
Meiqiu Xie ◽  
Shengli Zhang ◽  
Xuhai Liu ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Double Perovskite ◽  
Spin Splitting ◽  
Ferromagnetic Semiconductors ◽  
High Curie Temperature ◽  
Intrinsic Ferromagnetism ◽  
Curie Temperatures ◽  
Large Spin

We introduce perovskite halides into spintronics, and these materials are ferromagnetic semiconductors with large spin splitting and high Curie temperatures.

Magnetisation and Magneto-Resistance Study of Ferromagnetic Metal/Half Metallic Double Perovskite Bi-Layers

2011 ◽  
Vol 700 ◽  
pp. 33-36 ◽  
Author(s):  
Duncan M. McCann ◽  
Grant V. M. Williams ◽  
Adam R. Hyndman ◽  
Jibu Stephen
Keyword(s):  
Thin Film ◽  
Curie Temperature ◽  
Double Perovskite ◽  
Ferromagnetic Metal ◽  
Half Metallic ◽  
Layer Film ◽  
Anomalous Peak ◽  
Magneto Resistance

We observe a large magneto-resistance in very thin Ba2FeMoO6films of ~-12% at 10K, which is not significantly changed when thin NiFe/Ba2FeMoO6bi-layers are made. This suggests that the magneto-resistance in both cases is dominated by inter-grain tunnelling in the Ba2FeMoO6thin film. There is an anomalous peak in the resistance at ~300K in the bi-layer film that can not be easily explained. However, we know that the temperature where this peak occurs is close to the Ba2FeMoO6Curie temperature.

Magnetic Transitions in the Double Perovskite Sr2FeRe1-xFexO6(0≤X≤0.5)

2008 ◽  
Vol 1119 ◽  
Author(s):  
Haitao Gao ◽  
Vadim Ksenofotov ◽  
Joachim Barth ◽  
Martin Panthöefer ◽  
Felser Claudia ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Transport Properties ◽  
Solid Solutions ◽  
Magnetic Moment ◽  
Parent Compound ◽  
Structural Evolution ◽  
Double Perovskite ◽  
Magnetic Transitions ◽  
Mössbauer Data ◽  
Redox Buffer

AbstractThe synthesis, structure, and magnetic and transport properties of solid solutions Sr2FeRe1-xFexO6 (0≤x≤0.5) are reported. A structural evolution in the solid solutions from a double perovskite to perovskite is observed with increasing Fe/Re disorder. Except for the metallic parent compound all members of the series are semiconducting. For the Fe-doped samples a change from ferrimagnetic interactions in the parent compound to a complex superposition of ferrimagnetic and antiferromagnetic interactions was observed. The magnetic moment decreases with x, whereas the Curie temperature TC remains unaffected. The magnetic and Mössbauer data suggest Fe to act as a redox-buffer.

Magnetoresistance and Curie temperature of double perovskite Sr2FeW0.75Mo0.25O6 under high pressure

2006 ◽  
Vol 378-380 ◽  
pp. 546-547
Author(s):  
S. Kaji ◽  
G. Oomi ◽  
Y. Tomioka ◽  
Y. Tokura
Keyword(s):  
High Pressure ◽  
Curie Temperature ◽  
Double Perovskite

The Effect of Substituting of Al on the Curie Temprature and Magneto-Resistance of Double Perovskite Compounds

2012 ◽  
Vol 548 ◽  
pp. 341-344
Author(s):  
Xiang Hu Li ◽  
Dan Li
Keyword(s):  
Curie Temperature ◽  
Sol Gel ◽  
Double Perovskite ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Al Substitution ◽  
Diffraction Patterns ◽  
Magneto Resistance ◽  
Fe Substitution

The compounds of Fe substitution of Al in nanotructured Sr2Fe1-xAlxMoO6(0≤x≤0.2) double perovskite have been prepared by sol-gel method. The x-ray diffraction patterns of the samples show that the samples are in nanometer range. The Curie temperature and thesaturation magnetization of the samples decrease with the increasing of Al substitution. And the magnetoresistance of the samples increase with the increasing of x.

Effects of carrier doping on Curie temperature in double perovskite Ba2FeMoO6

2005 ◽  
Vol 290-291 ◽  
pp. 1009-1011 ◽  
Author(s):  
J. Kim ◽  
J.G. Sung ◽  
H.M. Yang ◽  
B.W. Lee
Keyword(s):  
Curie Temperature ◽  
Double Perovskite ◽  
Carrier Doping

Enhancement of Curie temperature and room-temperature magnetoresistance in double perovskite (Sr1.6Ba0.4)FeMoO6

2004 ◽  
Vol 129 (11) ◽  
pp. 753-755 ◽  
Author(s):  
X.M. Feng ◽  
G.H. Rao ◽  
G.Y. Liu ◽  
W.F. Liu ◽  
Z.W. Ouyang ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Room Temperature ◽  
Double Perovskite

scholarly journals Increase of Curie temperature with La doping in the double perovskite Sr2-LayFeMoO6 within an electronic correlation approach

2018 ◽  
Vol 64 (2) ◽  
pp. 145
Author(s):  
Francisco Estrada Chávez ◽  
E. J. Guzmán ◽  
Bertha Aguilar ◽  
Oracio Navarro ◽  
Michel Avignon
Keyword(s):  
Curie Temperature ◽  
Density Of States ◽  
Double Exchange ◽  
Double Perovskite ◽  
Expansion Method ◽  
Electronic Correlation ◽  
Half Metallic ◽  
Conduction Electrons ◽  
Ferromagnetic Character

The double perovskite compound Sr2FeMoO6 has a half-metallic ferromagnetic character and ahigh Curie temperature (420 K). Fe-Mo usually present some degree of disorder in either Fe orMo ions, it is therefore fundamental to understand the role of electronic and structural parameterscontrolling the half-metallic character together with a Curie temperature as high as possible. We replaceddivalent Sr2+ by trivalent La3+ ions in Sr2FeMoO6 system to observe the Curie temperaturebehavior. We present an electronic approach using the Green's functions and the renormalizationperturbation expansion method, with localized Fe-spins and conduction Mo-electrons interactingwith the local spins via a double-exchange-type mechanism. We also include the electronic correlationsamong the conduction electrons within a mean-eld approximation. Our results showthe density of states and the Curie temperature behavior when La concentration increases for theSr2y-yLayFeMoO6 system

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