scholarly journals Magnetic disorder in superconductors: Enhancement by mesoscopic fluctuations

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
I. S. Burmistrov ◽  
M. A. Skvortsov
Keyword(s):  
Magnetic Disorder

Asymmetric magnetic disorder observed in thermally activated magnetization reversal of exchange-biased IrMn/CoFe films

2013 ◽  
Vol 325 ◽  
pp. 13-16 ◽  
Author(s):  
Hun-Sung Lee ◽  
Kwang-Su Ryu ◽  
Chun-Yeol You ◽  
Kun-Rok Jeon ◽  
See-Hun Yang ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Thermally Activated ◽  
Magnetic Disorder

Magnetic disorder induced enhanced magneto-resistance in La0.5Sr0.5Co1−xRuxO3

2003 ◽  
Vol 125 (2) ◽  
pp. 103-106 ◽  
Author(s):  
S Sundar Manoharan ◽  
Ranjan K Sahu ◽  
D Elefant ◽  
C.M Schneider
Keyword(s):  
Magnetic Disorder ◽  
Magneto Resistance

scholarly journals Unexpected impact of magnetic disorder on multiband superconductivity

2014 ◽  
Vol 90 (13) ◽  
Author(s):  
M. M. Korshunov ◽  
D. V. Efremov ◽  
A. A. Golubov ◽  
O. V. Dolgov
Keyword(s):  
Multiband Superconductivity ◽  
Magnetic Disorder

Reverse Monte Carlo modelling of neutron powder diffraction data

1999 ◽  
Vol 55 (5) ◽  
pp. 783-789 ◽  
Author(s):  
A. Mellergård ◽  
R. L. McGreevy
Keyword(s):  
Monte Carlo ◽  
Powder Diffraction ◽  
Direct Calculation ◽  
Neutron Powder Diffraction ◽  
Reverse Monte Carlo ◽  
Powder Diffraction Data ◽  
Crystalline Materials ◽  
Neutron Powder Diffraction Data ◽  
Magnetic Disorder ◽  
Initial Results

A new reverse Monte Carlo (RMC) method for modelling both lattice and magnetic disorder in powder crystalline materials by direct calculation of the structure factor has been developed. The method, the program and the basic theory are described in some detail. Initial results from modelling the lattice and magnetic structure of MnO around the Néel temperature are also presented.

Magnetisation phenomena due to magnetic disorder in the partly frustrated compounds (FexCr1−x)2Ca3(GeO4)3

1986 ◽  
Vol 59 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Th. Brückel ◽  
U. Köbler ◽  
W. Prandl ◽  
R. Weinmann
Keyword(s):  
Magnetic Disorder

Magnetic disorder in the Cu0.995Fe0.005O solid solution

1999 ◽  
Vol 192 (1) ◽  
pp. 77-82 ◽  
Author(s):  
S.J. Stewart ◽  
R.A. Borzi ◽  
R.C. Mercader
Keyword(s):  
Solid Solution ◽  
Magnetic Disorder

Ferro-Antiferromagnetic Coupling and Enhancement of Magnetoresistance in La0.67Ca0.33MnO3/LaMnO3 Composites

2013 ◽  
Vol 662 ◽  
pp. 485-489
Author(s):  
Guang Ming Ren ◽  
Jing Lin Liu
Keyword(s):  
Electrical Transport ◽  
Composite System ◽  
Zero Magnetic Field ◽  
Antiferromagnetic Coupling ◽  
Nominal Composition ◽  
Spin Polarized ◽  
Magnetic Disorder ◽  
Transport Behaviour ◽  
Lower Temperature ◽  
Grain Surface

The samples with the nominal composition of (1-x)La0.67Ca0.33MnO3/xLaMnO3 with x=0.00, 0.05, 0.15 and 0.25 were fabricated using a special experimental method. The electrical transport behaviour and magnetoresistance (MR) were studied for the composites in magnetic fields H=0.3T, 3T. Experimental results show that with the increasing LaMnO3 doping level, the metal–insulator（M-I） transition temperature TP shifts to lower temperature and the resistivity increases sharply in zero magnetic field. Meanwhile, a significant enhancement in MR is observed for the composites especially in the low temperature range（below TP）. Specially, the maximum MR at 3 T increased from 35% for the pure La0.67Ca0.33MnO3 to 92% for the sample with x=0.25. We suggest that such enhancement in MR is attributed to the strong ferro-antiferromagnetic coupling effects in the composite system, which increase the magnetic disorder at the grain surface and boundary, will improve the spin-polarized tunneling process of the conducting electron between adjacent grains, and thus enhance the MR effects.

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