Room-temperature ferromagnetism in Fe-doped wide band gap ferroelectric Bi0.5K0.5TiO3 nanocrystals

被引：49

作者：

Dang Duc Dung ^{[1
]}

Duong Van Thiet ^{[1
,2
]}

Odkhuu, Dorj ^{[3
]}

Le Viet Cuong ^{[4
]}

Nguyen Hoang Tuan ^{[1
]}

Cho, Sunglae ^{[2
]}

机构：

[1] Ha Noi Univ Sci & Technol, Sch Engn Phys, Dept Gen Phys, Hanoi, Vietnam

[2] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[3] Incheon Natl Univ, Dept Phys, Inchon 406772, South Korea

[4] Univ Engn & Technol, Lab Micronano Technol, VNUH, Hanoi, Vietnam

来源：

MATERIALS LETTERS | 2015年 / 156卷

关键词：

Lead-free ferroelectric; Ferromagnetism; Multiferroics; Perovskites; Sol-gel; MAGNETISM; SRTIO3;

D O I：

10.1016/j.matlet.2015.05.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We reported the room-temperature ferromagnetism in iron doped Bi0.5K0.5TiO3 nanocrystals. The reduction of band gap from 3.31 eV to 2.27 eV was obtained after introduction of iron to Bi0.5K0.5TiO3 with concentration up to 7 mol%. The first-principles density function theory (OFT) calculations indicate that the reduction of band gap is due to the presence of conduction bands of iron, and the ferromagnetism in iron-doped Bi0.5K0.5TiO3 samples was explained by the exchange splitting between spin subbands through crystal field theory. This method may provide an available way to get single-phase multiferroics and resolve the problem of the scarcity of single-phase multiferroics in nature. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：129 / 133

页数：5

共 30 条

[1] Magnetism without magnetic ions in non-magnetic perovskites SrTiO3, SrZrO3 and SrSnO3 [J].

Bannikov, V. V. ;

Shein, I. R. ;

Kozhevnikov, V. L. ;

Ivanovskii, A. L. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (06) :936-942

[2] Materials science - Lead-free at last [J].

Cross, E .

NATURE, 2004, 432 (7013) :24-25

[3]

Hill NA, 2000, J PHYS CHEM B, V104, P6694, DOI 10.1021/jpc00114x

[4] Fe(III) doped and grafted PbTiO3 film photocathode with enhanced photoactivity for hydrogen production [J].

Hu, Yuxiang ;

Dong, Wen ;

Zheng, Fengang ;

Fang, Liang ;

Shen, Mingrong .

APPLIED PHYSICS LETTERS, 2014, 105 (08)

[5] Electric polarization reversal and memory in a multiferroic material induced by magnetic fields [J].

Hur, N ;

Park, S ;

Sharma, PA ;

Ahn, JS ;

Guha, S ;

Cheong, SW .

NATURE, 2004, 429 (6990) :392-395

[6]

Jaffe B, 2012, Piezoelectric ceramics

[7] Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186

[8] ABINITIO MOLECULAR-DYNAMICS FOR LIQUID-METALS [J].

KRESSE, G ;

HAFNER, J .

PHYSICAL REVIEW B, 1993, 47 (01) :558-561

[9] Influence of Mn Doping on the Structure, Optical, and Magnetic Properties of PbTiO3 Material [J].

Le Mai Oanh ;

Danh Bich Do ;

Nguyen Dang Phu ;

Nguyen Thi Phuong Mai ;

Nguyen Van Minh .

IEEE TRANSACTIONS ON MAGNETICS, 2014, 50 (06)

[10] Electronics without lead [J].

Li, Y ;

Moon, KS ;

Wong, CP .

SCIENCE, 2005, 308 (5727) :1419-1420

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