Increasing spin polarization in Fe3O4 films by engineering antiphase boundary densities

被引：20

作者：

Liu, Er ^{[1
,2
]}

Yin, Yuli ^{[2
]}

Sun, Li ^{[3
]}

Zhai, Ya ^{[2
,4
]}

Du, Jun ^{[4
]}

Xu, Feng ^{[1
]}

Zhai, Hongru ^{[4
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China

[3] Hainan Normal Univ, Dept Phys & Elect Engn, Haikou 571158, Peoples R China

[4] Nanjing Univ, Natl Lab Solid Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 14期

基金：

中国博士后科学基金;

关键词：

THIN-FILMS; MAGNETITE; MAGNETORESISTANCE;

D O I：

10.1063/1.4979586

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a systematical study on the evolution of antiphase boundary (APB) densities in Fe3O4 films, which were prepared by pulsed laser deposition and post annealing at different temperatures. By measuring the electron-phonon coupling parameter and using Allen's formula, we evaluate the films' antiphase boundary densities, which show a decreasing tendency with increasing annealing temperature. Consequently, a 50% increase of spin polarization in Fe3O4 films is achieved, and a 110% increase of the magnetoresistance ratio was found in 900 degrees C annealed Fe3O4 films compared to the as-grown sample. This work could contribute to the effective manipulation of APB densities and spin polarization in Fe3O4 films, which is desirable for the application of spintronics devices based on Fe3O4 films. Published by AIP Publishing.

引用

页数：5

共 24 条

[1] Short-Range Correlations in Magnetite above the Verwey Temperature [J].

Bosak, Alexey ;

Chernyshov, Dmitry ;

Hoesch, Moritz ;

Piekarz, Przemyslaw ;

Le Tacon, Mathieu ;

Krisch, Michael ;

Kozlowski, Andrzej ;

Oles, Andrzej M. ;

Parlinski, Krzysztof .

PHYSICAL REVIEW X, 2014, 4 (01)

[2] Magnetic and electrical characterizations of half-metallic Fe3O4 nanowires [J].

Chang, Mu-Tung ;

Chou, Li-Jen ;

Hsieh, Chin-Hua ;

Chueh, Yu-Lun ;

Wang, Zhong Lin ;

Murakami, Yasukazu ;

Shindo, Daisuke .

ADVANCED MATERIALS, 2007, 19 (17) :2290-+

[3] Hydrothermal synthesis of monodisperse magnetite nanoparticles [J].

Daou, T. J. ;

Pourroy, G. ;

Begin-Colin, S. ;

Greneche, J. M. ;

Ulhaq-Bouillet, C. ;

Legare, P. ;

Bernhardt, P. ;

Leuvrey, C. ;

Rogez, G. .

CHEMISTRY OF MATERIALS, 2006, 18 (18) :4399-4404

[4] Spin-polarized transport across sharp antiferromagnetic boundaries [J].

Eerenstein, W ;

Palstra, TTM ;

Saxena, SS ;

Hibma, T .

PHYSICAL REVIEW LETTERS, 2002, 88 (24) :4-247204

[5] Gate voltage induced phase transition in magnetite nanowires [J].

Gooth, Johannes ;

Zierold, Robert ;

Gluschke, Jan G. ;

Boehnert, Tim ;

Edinger, Stefan ;

Barth, Sven ;

Nielsch, Kornelius .

APPLIED PHYSICS LETTERS, 2013, 102 (07)

[6] Raman study of stoichiometric and Zn-doped Fe3O4 -: art. no. 104430 [J].

Gupta, R ;

Sood, AK ;

Metcalf, P ;

Honig, JM .

PHYSICAL REVIEW B, 2002, 65 (10) :1044301-1044308

[7] Room temperature formation of half-metallic Fe3O4 thin films for the application of spintronic devices [J].

Hong, JP ;

Lee, SB ;

Jung, YW ;

Lee, JH ;

Yoon, KS ;

Kim, KW ;

Kim, CO ;

Lee, CH ;

Jung, MH .

APPLIED PHYSICS LETTERS, 2003, 83 (08) :1590-1592

[8] Negative spin polarization of Fe3O4 in magnetite/manganite-based junctions -: art. no. 276601 [J].

Hu, G ;

Suzuki, Y .

PHYSICAL REVIEW LETTERS, 2002, 89 (27)

[9] Theory of tunneling magnetoresistance in granular magnetic films [J].

Inoue, J ;

Maekawa, S .

PHYSICAL REVIEW B, 1996, 53 (18) :11927-11929

[10] Electric field assisted sputtering of Fe3O4 thin films and reduction in anti-phase boundaries [J].

Kumar, Ankit ;

Pandya, Dinesh K. ;

Chaudhary, Sujeet .

JOURNAL OF APPLIED PHYSICS, 2012, 112 (07)

← 1 2 3 →