Effect of High-Energy Electron Irradiation on the Transport and Magnetoresistive Behavior in La0.64Ca0.36MnO3 Films

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3409-3411 ◽  
Author(s):  
A. Parasiris ◽  
K. D. D. Rathnayaka ◽  
D. G. Naugle ◽  
B. I. Belevtsev ◽  
V. B. Krasovitsky ◽  
...  
Keyword(s):  
Phase Transition ◽  
Point Defects ◽  
Electron Irradiation ◽  
Colossal Magnetoresistance ◽  
Oxygen Depletion ◽  
High Energy ◽  
Ferromagnetic Phase ◽  
High Energy Electron ◽  
In Doping ◽  
Ferromagnetic Phase Transition

Defects introduced by irradiating LaCaMnO films with high-energy (≃ 6 MeV ) electrons produce a significant increase in film resistivity but have only a small effect on the colossal magnetoresistance and the temperature of the ferromagnetic phase transition. These results suggest that electron irradiation produces mainly point defects rather than a change in doping by oxygen depletion.

POLARON AND SPIN-POLARON EFFECTS IN THE COLOSSAL MAGNETORESISTANCE

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3808-3814 ◽  
Author(s):  
Y. M. MALOZOVSKY ◽  
J. D. FAN
Keyword(s):  
Phase Transition ◽  
Colossal Magnetoresistance ◽  
Manganese Oxides ◽  
Spin Diffusion ◽  
Magnetic Moments ◽  
Spin Fluctuations ◽  
Ferromagnetic Phase ◽  
Spin Polaron ◽  
Ferromagnetic Phase Transition ◽  
Polaron Formation

The polaron formation due to the strong interaction of electrons with the optical phonons in a layered manganese oxides is considered. The diffusion of nearly localized polarons in the presence of the spin-dependent and multiple scattering on the randomly oriented and/or distributed magnetic moments of atoms is considered. The spin diffusion coefficient in the case of the exchange interaction between the diffusive but nearly localized polarons is evaluated. It is shown that the polaron localization leads to the vanishing of the spin diffusion and hence the ferromagnetic phase transition. The spin-polaron effect caused by the interaction of polarons with the spin fluctuations further significantly reduces conductivity near the temperature of the ferromagnetic phase transition as shown.

scholarly journals Influence of high-energy electron irradiation on the transport properties of La Ca MnO films ( )

2000 ◽  
Vol 15 (3) ◽  
pp. 461-468
Author(s):  
B.I. Belevtsev ◽  
V.B. Krasovitsky ◽  
V.V. Bobkov ◽  
D.G. Naugle ◽  
K.D.D. Rathnayaka ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electron Irradiation ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron

Influence of high energy electron irradiation on the characteristics of polysilicon thin film transistors

2006 ◽  
Vol 52 (3) ◽  
pp. 355-359 ◽  
Author(s):  
P. V. Aleksandrova ◽  
V. K. Gueorguiev ◽  
Tz. E. Ivanov ◽  
S. Kaschieva
Keyword(s):  
Thin Film ◽  
Electron Irradiation ◽  
Thin Film Transistors ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron

Ferromagnetic phase transition in ultra-thin films

2006 ◽  
Vol 243 (6) ◽  
pp. 1352-1359 ◽  
Author(s):  
S. Tuleja ◽  
J. Kecer ◽  
V. Ilkovič
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Ferromagnetic Phase ◽  
Ferromagnetic Phase Transition

Raman spectroscopy ofSrRuO3near the paramagnetic-to-ferromagnetic phase transition

1999 ◽  
Vol 59 (1) ◽  
pp. 364-368 ◽  
Author(s):  
M. N. Iliev ◽  
A. P. Litvinchuk ◽  
H.-G. Lee ◽  
C. L. Chen ◽  
M. L. Dezaneti ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
Ferromagnetic Phase ◽  
Ferromagnetic Phase Transition
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