Abstract
We report on a systematic study of the correlation between the disorder produced by ion irradiation and the magnetoresistance (MR) behavior of two doped manganite films: a highly textured La0.67Sr0.33MnO3 film on a (100) LaAlO3 substrate and a film of La0.67Ca0.33MnO3 on a YSZ substrate with a high degree of large-angle grain boundary disorder. The films were grown via metal organic chemical vapor deposition and exposed to irradiation of 200 keV Ne ions. The temperature and field dependence of the resistivity were measured on the same samples at different levels of damage. For the Sr-doped film, the bulk magnetic properties were observed to degrade faster with cumulative damage than transport. For both films at low temperature, a low-field hysteretic MR was either induced or enhanced by ion damage. These effects are discussed in terms of diffusive transport through "granular" magnetically disordered regions.
| Original language | English |
|---|---|
| Pages (from-to) | 4791-4793 |
| Number of pages | 3 |
| Journal | Journal of Applied Physics |
| Volume | 85 |
| Issue number | 8 II A |
| Publication status | Published - 15 Apr 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
Cite this
Effect of ion-irradiation-induced disorder on the low-field magnetoresistance of La0.67A0.33MnO3 (A=Sr, Ca). / Watts, S. M.; Li, M.; Wirth, S.; Dahmen, K. H.; Von Molnár, S.; Xiong, P.; Katz, A. S.; Dynes, R. C.
In: Journal of Applied Physics, Vol. 85, No. 8 II A, 15.04.1999, p. 4791-4793.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effect of ion-irradiation-induced disorder on the low-field magnetoresistance of La0.67A0.33MnO3 (A=Sr, Ca)
AU - Watts, S. M.
AU - Li, M.
AU - Wirth, S.
AU - Dahmen, K. H.
AU - Von Molnár, S.
AU - Xiong, P.
AU - Katz, A. S.
AU - Dynes, R. C.
PY - 1999/4/15
Y1 - 1999/4/15
N2 - We report on a systematic study of the correlation between the disorder produced by ion irradiation and the magnetoresistance (MR) behavior of two doped manganite films: a highly textured La0.67Sr0.33MnO3 film on a (100) LaAlO3 substrate and a film of La0.67Ca0.33MnO3 on a YSZ substrate with a high degree of large-angle grain boundary disorder. The films were grown via metal organic chemical vapor deposition and exposed to irradiation of 200 keV Ne ions. The temperature and field dependence of the resistivity were measured on the same samples at different levels of damage. For the Sr-doped film, the bulk magnetic properties were observed to degrade faster with cumulative damage than transport. For both films at low temperature, a low-field hysteretic MR was either induced or enhanced by ion damage. These effects are discussed in terms of diffusive transport through "granular" magnetically disordered regions.
AB - We report on a systematic study of the correlation between the disorder produced by ion irradiation and the magnetoresistance (MR) behavior of two doped manganite films: a highly textured La0.67Sr0.33MnO3 film on a (100) LaAlO3 substrate and a film of La0.67Ca0.33MnO3 on a YSZ substrate with a high degree of large-angle grain boundary disorder. The films were grown via metal organic chemical vapor deposition and exposed to irradiation of 200 keV Ne ions. The temperature and field dependence of the resistivity were measured on the same samples at different levels of damage. For the Sr-doped film, the bulk magnetic properties were observed to degrade faster with cumulative damage than transport. For both films at low temperature, a low-field hysteretic MR was either induced or enhanced by ion damage. These effects are discussed in terms of diffusive transport through "granular" magnetically disordered regions.
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M3 - Article
AN - SCOPUS:0000682521
VL - 85
SP - 4791
EP - 4793
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 8 II A
ER -