Magnetoresistance of Polycrystalline La_{0.7}Ca_{0.3}MnO_3 Films in a Microwave Magnetic Field

• Authors: A. Lučun , R. Butkutė , A. Maneikis , O. Kiprijanovič , F. Anisimovas , J. Gradauskas , A. Sužiedėlis , B. Vengalis , Ž. Kancleris , S. Ašmontas
• Languages of publication: EN

Abstracts

EN

We present new experimental evidence indicating the importance of magnetic field component of microwave field (f=9.4 GHz) for magnetoresistive properties of polycrystalline La_{0.7}Ca_{0.3}MnO_3 films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La_{0.7}Ca_{0.3}MnO_3 films placed in the centre (maximal amplitude of H_{10} wave vector) and at a narrow wall of the wave-guide (reduced H_{10} amplitude). Theoretical estimations of the influence of substrate onto distribution of microwave electric and magnetic fields in the waveguide were performed using the finite-difference time-domain method.

Keywords

EN

75.47.Gk; 75.47.Lx; 07.57.Kp

Discipline

• 07.57.Kp: Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors(see also 85.60.Gz Photodetectors in electronic and magnetic devices, and 95.55.Rg Photoconductors and bolometers in astronomy)
• 75.47.Gk: Colossal magnetoresistance
• 75.47.Lx: Magnetic oxides

• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 111
• Issue: 1
• Pages: 147-152

Dates

published

2007-01

received

2006-09-04

Contributors

author

A. Lučun

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

R. Butkutė

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

A. Maneikis

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

O. Kiprijanovič

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

F. Anisimovas

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

J. Gradauskas

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania
• Vilnius Gediminas Technical University, Saulėtekio al. 11, 2040 Vilnius, Lithuania

author

A. Sužiedėlis

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania
• Vilnius Gediminas Technical University, Saulėtekio al. 11, 2040 Vilnius, Lithuania

author

B. Vengalis

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania
• Vilnius Gediminas Technical University, Saulėtekio al. 11, 2040 Vilnius, Lithuania

author

Ž. Kancleris

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania

author

S. Ašmontas

• Semiconductor Physics Institute, A. Goštauto 11, Vilnius, 01108 Lithuania
• KTU Panevėžys Institute, Klaipėdos 3, 5319 Panevėžys, Lithuania

References

• 1. S. Asmontas, F. Anisimovas, S. Balevicius, P. Cimmperman, J. Gradauskas, A. Lucun, V. Stankevic, A. Suziedelis, B. Vengalis, N. Zurauskiene, Acta Phys. Pol. A, 107, 193, 2005
• 2. P. Cimmperman, V. Stankevic, N. Zurauskiene, S. Balevicius, F. Anisimovas, J. Parseliunas, O. Kiprijanovic, L.L. Altgilbers, Acta Phys. Pol. A, 105, 107, 2004
• 3. A. Taflove, Computational Electrodynamics: The Finite-Difference Time-Domain Method, Artech House, Norwood, MA 1995

Identifiers

DOI

10.12693/APhysPolA.111.147