Defect ferromagnetism induced by lower valence cation doping: Li-doped SnO2 nanoparticles

被引：11

作者：

Akbar, S. ^{[1
,2
]}

Hasanain, S. K. ^{[2
,4
]}

Ivashenko, O. ^{[1
,5
]}

Dutka, M. V. ^{[1
]}

Ali, N. Z. ^{[3
,6
]}

Blake, G. R. ^{[1
]}

De Hosson, J. Th. M. ^{[1
]}

Rudolf, P. ^{[1
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, Nijenborgh 4, NL-9747 AG Groningen, Netherlands

[2] Quaid I Azam Univ, Dept Phys, Islamabad, Pakistan

[3] Natl Ctr Phys, QAU Campus,Shahdra Valley Rd,POB 2141, Islamabad 44000, Pakistan

[4] COMSTECH Secretariat, 33 Constitut Ave,G-5-2, Islamabad 44000, Pakistan

[5] Univ Oslo, Ctr Mat Sci & Nanotechnol, Sem Saelands Vei 26, N-0371 Oslo, Norway

[6] BAM Fed Inst Mat Res & Testing, Richard Willstaetter Str 11, Berlin, Germany

来源：

RSC ADVANCES | 2020年 / 10卷 / 44期

关键词：

ROOM-TEMPERATURE FERROMAGNETISM;

D O I：

10.1039/d0ra03644g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To explore the role of Li in establishing room-temperature ferromagnetism in SnO2, the structural, electronic and magnetic properties of Li-doped SnO(2)compounds were studied for different size regimes, from nanoparticles to bulk crystals. Li-doped nanoparticles show ferromagnetic ordering plus a paramagnetic contribution for particle sizes in the range of 16-51 nm, while pure SnO(2)and Li-doped compounds below and above this particular size range are diamagnetic. The magnetic moment is larger for compositions where the Li substitutes for Sn than for compositions where Li prevalently occupies interstitial sites. The observed ferromagnetic ordering in Li-doped SnO(2)nanoparticles is mainly due to the holes created when Li substitutes at a Sn site. Conversely, Li acts as an electron donor and electrons from Li may combine with holes to decrease ferromagnetism when lithium mainly occupies interstitial sites in the SnO(2)lattice.

引用

页码：26342 / 26348

页数：7

共 20 条

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