Magnetic Properties of Hole-Doped Pyrochlore Iridate (Y1-x-yCuxCay)2Ir2O7
| Autor: | Retno Asih, Isao Watanabe, Yukio Hinatsu, Julia Angel, Mohamed Ismail Mohamed-Ibrahim, Shukri Sulaiman, Makoto Wakeshima, Muhammad Redo Ramadhan, Irwan Ramli, Tomoya Taniguchi, Kazuyuki Matsuhira, Hironori Nomura |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Condensed matter physics Magnetism Mechanical Engineering Doping Pyrochlore chemistry.chemical_element 02 engineering and technology Yttrium engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences chemistry Mechanics of Materials 0103 physical sciences engineering General Materials Science Iridium Metal–insulator transition 010306 general physics 0210 nano-technology |
| Zdroj: | Materials Science Forum. 966:269-276 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.966.269 |
| Popis: | We report the results of studies on the electronic state of the hole-doped Y-based pyrochlore iridate, (Y1-x-yCuxCay)2Ir2O7. We carried out the resistivity, Muon Spin Relaxation (μSR), X-ray Photoemission Spectroscopy (XPS) measurements and Density Functional Theory (DFT) calculations on the non-doped (x=y=0) and doped (x=0.05, y=0.15) systems. We found in the non-doped system that the magnetic ordering of Ir spins which was accompanied by the metal-insulator transition (MIT) occurred at around 157 K and disappeared in the doped system in which MIT seems to disappear or smeared out. We suggest from the current study that a quantum critical point which shows a change in the electronic ground state from insulating to metallic to exist between those two systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|