Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes
The magnetotransport and magnetoresistive (MR)properties of manganese-based La0.67Ca0.33MnO3 perovskite with different grain sizes are reported. The electrical resistivity was measured as a function of temperature in magnetic fields of 0.5 and 1 T. The insulator–metal transition temperature, TIM,...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Springer
2009
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/15505/1/Magnetotransport%20properties%20of%20La0.pdf |
| _version_ | 1825945634390147072 |
|---|---|
| author | Ewe, Lay Sheng Hamadneh, Imad (Moh'd Khair) Rashid Ali Salama, Hazar Ali Ahmed A. Hamid, Nasri Shaari, Abdul Halim Abd Shukor, Roslan |
| author_facet | Ewe, Lay Sheng Hamadneh, Imad (Moh'd Khair) Rashid Ali Salama, Hazar Ali Ahmed A. Hamid, Nasri Shaari, Abdul Halim Abd Shukor, Roslan |
| author_sort | Ewe, Lay Sheng |
| collection | UPM |
| description | The magnetotransport and magnetoresistive (MR)properties of manganese-based La0.67Ca0.33MnO3 perovskite with different grain sizes are reported. The electrical resistivity
was measured as a function of temperature in magnetic
fields of 0.5 and 1 T. The insulator–metal transition
temperature, TIM, shifted to a higher temperature with the
application of the magnetic field. In zero field, TIM is almost constant (∼271 K) for all samples except for the sample with the largest grain size, where TIM = 265 K. The temperature dependence of resistivity was fitted with several equations in the metallic (ferromagnetic) region and the insulating (paramagnetic) region. The density of states at the Fermi level, N(EF), and the activation energy of electron hopping were estimated by fitting the resistivity versus temperature curves. The ρ–T 2 curves are nearly linear in the metallic regime, but the ρ–T 2.5 curves exhibit a deviation from linearity. The variable range hopping model and small polaron hopping model fit the data well in the high-temperature region,indicating the existence of the Jahn–Teller distortion that localizes the charge carriers. MR was found to increase with an increase in the magnetic field, an effect which is attributed to the intergrain spin tunneling effect. |
| first_indexed | 2024-03-06T07:34:32Z |
| format | Article |
| id | upm.eprints-15505 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T07:34:32Z |
| publishDate | 2009 |
| publisher | Springer |
| record_format | dspace |
| spelling | upm.eprints-155052017-10-27T02:17:38Z http://psasir.upm.edu.my/id/eprint/15505/ Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes Ewe, Lay Sheng Hamadneh, Imad (Moh'd Khair) Rashid Ali Salama, Hazar Ali Ahmed A. Hamid, Nasri Shaari, Abdul Halim Abd Shukor, Roslan The magnetotransport and magnetoresistive (MR)properties of manganese-based La0.67Ca0.33MnO3 perovskite with different grain sizes are reported. The electrical resistivity was measured as a function of temperature in magnetic fields of 0.5 and 1 T. The insulator–metal transition temperature, TIM, shifted to a higher temperature with the application of the magnetic field. In zero field, TIM is almost constant (∼271 K) for all samples except for the sample with the largest grain size, where TIM = 265 K. The temperature dependence of resistivity was fitted with several equations in the metallic (ferromagnetic) region and the insulating (paramagnetic) region. The density of states at the Fermi level, N(EF), and the activation energy of electron hopping were estimated by fitting the resistivity versus temperature curves. The ρ–T 2 curves are nearly linear in the metallic regime, but the ρ–T 2.5 curves exhibit a deviation from linearity. The variable range hopping model and small polaron hopping model fit the data well in the high-temperature region,indicating the existence of the Jahn–Teller distortion that localizes the charge carriers. MR was found to increase with an increase in the magnetic field, an effect which is attributed to the intergrain spin tunneling effect. Springer 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15505/1/Magnetotransport%20properties%20of%20La0.pdf Ewe, Lay Sheng and Hamadneh, Imad (Moh'd Khair) Rashid and Ali Salama, Hazar Ali Ahmed and A. Hamid, Nasri and Shaari, Abdul Halim and Abd Shukor, Roslan (2009) Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes. Applied Physics A: Materials Science & Processing, 95 (2). pp. 457-463. ISSN 0947-8396; ESSN: 1432-0630 https://link.springer.com/article/10.1007%2Fs00339-008-4908-1 10.1007/s00339-008-4908-1 |
| spellingShingle | Ewe, Lay Sheng Hamadneh, Imad (Moh'd Khair) Rashid Ali Salama, Hazar Ali Ahmed A. Hamid, Nasri Shaari, Abdul Halim Abd Shukor, Roslan Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title | Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title_full | Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title_fullStr | Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title_full_unstemmed | Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title_short | Magnetotransport properties of La0.67Ca0.33MnO3 with different grain sizes |
| title_sort | magnetotransport properties of la0 67ca0 33mno3 with different grain sizes |
| url | http://psasir.upm.edu.my/id/eprint/15505/1/Magnetotransport%20properties%20of%20La0.pdf |
| work_keys_str_mv | AT ewelaysheng magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes AT hamadnehimadmohdkhairrashid magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes AT alisalamahazaraliahmed magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes AT ahamidnasri magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes AT shaariabdulhalim magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes AT abdshukorroslan magnetotransportpropertiesofla067ca033mno3withdifferentgrainsizes |