TY - GEN
T1 - Magnetic properties of hole-doped pyrochlore iridate (Y1-x-ycuxcay)2ir2o7
AU - Angel, Julia
AU - Asih, Retno
AU - Nomura, Hironori
AU - Taniguchi, Tomoya
AU - Matsuhira, Kazuyuki
AU - Ramadhan, Muhammad Redo
AU - Ramli, Irwan
AU - Wakeshima, Makoto
AU - Hinatsu, Yukio
AU - Mohamed-Ibrahim, Mohamed Ismail
AU - Sulaiman, Shukri
AU - Watanabe, Isao
N1 - Funding Information:
The author, JA, would like to thank RIKEN Junior Research Associate (JRA) and Lembaga Pengelola Dana Pendidikan (LPDP) for financial support. We also thank for the allocation of computing resources on the Big Wave HOKUSAI Massive Parallel Computer (Project No: G18022) at the RIKEN Advanced Center for Computing and Communication (ACCC). This study was also supported by the Bilateral Program of Japan Society for the Promotion of Science (JPSJ), and this research was supported by JSPS KAKENHI Grant Number JP18H04327. This research was partly supported by Ministry of Education, Culture, Sports, Science, and Technology (MEXT) KAKENHI Grant Number JP15H03692. Two of us (SS and MIMI) would like to acknowledge the financial support by Universiti Sains Malaysia through a Research University Grant (Grant No. 1001/PJJAUH/870037). A part of this work was also conducted at Laboratory of XPS Analysis, Joint-Use Facilities, Hokkaido University, supported by “Nanotechnology Platform” Program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
Publisher Copyright:
© 2019 Trans Tech Publications Ltd, Switzerland.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
KW - Iridium
KW - Magnetism
KW - Metal-insulator transition
KW - Pyrochlore iridate
KW - Valence state
KW - Yttrium
UR - http://www.scopus.com/inward/record.url?scp=85071937186&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.966.269
DO - 10.4028/www.scientific.net/MSF.966.269
M3 - Conference contribution
AN - SCOPUS:85071937186
SN - 9783035714968
T3 - Materials Science Forum
SP - 269
EP - 276
BT - Functional Properties of Modern Materials II
A2 - Kurniawan, Budhy
A2 - Nugroho, Agustinus Agung
A2 - Darminto, null
A2 - Watanabe, Isao
A2 - Risdiana, null
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Functional Materials Science, ICFMS 2018
Y2 - 13 November 2018 through 15 November 2018
ER -