Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19)
We have performed resistivity measurements as a function of temperature, with and without an external magnetic field. Magnetization measurements are also done as a function of temperature M(T) as well as a function of an external magnetic field M(H) for La0.73Ca0.27Mn1-xCuxO3 compounds with 0&a...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2017-01-01
|
| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/223 |
| _version_ | 1797963703947100160 |
|---|---|
| author | Y. E. Gunanto W. A. Adi S. Poertadji T. Ono H. Tanaka E. Steven |
| author_facet | Y. E. Gunanto W. A. Adi S. Poertadji T. Ono H. Tanaka E. Steven |
| author_sort | Y. E. Gunanto |
| collection | DOAJ |
| description | We have performed resistivity
measurements as a function of
temperature, with and without an
external magnetic field. Magnetization measurements are also done as a function of
temperature M(T) as
well as a function of an external magnetic field M(H) for La0.73Ca0.27Mn1-xCuxO3 compounds with 0<x<0.19.
The samples with x = 0 and 0.06 are insulators. As for
the samples with x =
0.10, 0.13, and
0.19, they undergo an insulator to metal
transition as the temperature is lowered. The insulator-metal transition temperatures
are 24 K, 74 K, and 69 K for x =
0.10, 0.13, and
0.19, respectively. The magnetoresistance decreases with increasing values of Cu, i.e. 75%, 72%, 64%, and 35% for x = 0, 0.06, 0.10, and 0.13
respectively. Samples in accordance
with the model of crystalline metal Ln R
vs. 1/T are compared to Mott insulator models Ln R vs. 1/T0.25. Based on the magnetization curve, a
paramagnetic to ferromagnetic transition is observed at Curie temperature, TC,
of ~ 196 K, 170 K, 140 K, 137 K, and 113 K for x = 0, 0.06, 0.10, 0.13, and 0.19 respectively. |
| first_indexed | 2024-04-11T01:33:33Z |
| format | Article |
| id | doaj.art-535a49a1f158479db84550445a4423d3 |
| institution | Directory Open Access Journal |
| issn | 2086-9614 2087-2100 |
| language | English |
| last_indexed | 2024-04-11T01:33:33Z |
| publishDate | 2017-01-01 |
| publisher | Universitas Indonesia |
| record_format | Article |
| series | International Journal of Technology |
| spelling | doaj.art-535a49a1f158479db84550445a4423d32023-01-03T09:20:02ZengUniversitas IndonesiaInternational Journal of Technology2086-96142087-21002017-01-0181667510.14716/ijtech.v8i1.223223Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19)Y. E. Gunanto0W. A. Adi1S. Poertadji2T. Ono3H. Tanaka4E. Steven5Department of Biology Education, Faculty of Education, University of Pelita Harapan, Karawaci, Tangerang 15811, IndonesiaCenter for Science and Technology of Advanced Materials, BATAN, Tangerang Selatan 15314, IndonesiaDepartment of Physics, University of Indonesia, Depok 16424, IndonesiaDepartment of Physics, Osaka Prefecture University, Sakai, Osaka 599-8531, JapanDepartment of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, JapanDepartment of Physics, National High Magnetic Field Lab., Tallahassee, Florida 32310, USAWe have performed resistivity measurements as a function of temperature, with and without an external magnetic field. Magnetization measurements are also done as a function of temperature M(T) as well as a function of an external magnetic field M(H) for La0.73Ca0.27Mn1-xCuxO3 compounds with 0<x<0.19. The samples with x = 0 and 0.06 are insulators. As for the samples with x = 0.10, 0.13, and 0.19, they undergo an insulator to metal transition as the temperature is lowered. The insulator-metal transition temperatures are 24 K, 74 K, and 69 K for x = 0.10, 0.13, and 0.19, respectively. The magnetoresistance decreases with increasing values of Cu, i.e. 75%, 72%, 64%, and 35% for x = 0, 0.06, 0.10, and 0.13 respectively. Samples in accordance with the model of crystalline metal Ln R vs. 1/T are compared to Mott insulator models Ln R vs. 1/T0.25. Based on the magnetization curve, a paramagnetic to ferromagnetic transition is observed at Curie temperature, TC, of ~ 196 K, 170 K, 140 K, 137 K, and 113 K for x = 0, 0.06, 0.10, 0.13, and 0.19 respectively.http://ijtech.eng.ui.ac.id/article/view/223Curie temperatureMagnetoresistanceMetal-insulator transition |
| spellingShingle | Y. E. Gunanto W. A. Adi S. Poertadji T. Ono H. Tanaka E. Steven Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) International Journal of Technology Curie temperature Magnetoresistance Metal-insulator transition |
| title | Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) |
| title_full | Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) |
| title_fullStr | Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) |
| title_full_unstemmed | Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) |
| title_short | Phase Transitions in La0.73Ca0.27Mn1-xCuxO3 (0 < X < 0.19) |
| title_sort | phase transitions in la0 73ca0 27mn1 xcuxo3 0 x 0 19 |
| topic | Curie temperature Magnetoresistance Metal-insulator transition |
| url | http://ijtech.eng.ui.ac.id/article/view/223 |
| work_keys_str_mv | AT yegunanto phasetransitionsinla073ca027mn1xcuxo30x019 AT waadi phasetransitionsinla073ca027mn1xcuxo30x019 AT spoertadji phasetransitionsinla073ca027mn1xcuxo30x019 AT tono phasetransitionsinla073ca027mn1xcuxo30x019 AT htanaka phasetransitionsinla073ca027mn1xcuxo30x019 AT esteven phasetransitionsinla073ca027mn1xcuxo30x019 |