Large coercivity and unconventional exchange coupling in manganese-oxide-coated manganese–gallium nanoparticles

doi:10.1088/1674-1056/23/8/087503

Abstract The microstructures and magnetic properties of nanoparticles, each composed of an antiferromagnetic (AFM) manganese-oxide shell and a ferromagnetic-like core of manganese-gallium (MnGa) compounds, are studied. The core-shell structure is confirmed by transmission electron microscope (TEM). The ferromagnetic-like core contains three kinds of MnGa binary compounds, i.e., ferrimagnetic (FI) D0₂₂-type Mn₃Ga, ferromagnetic (FM) Mn₈Ga₅, and AFM D0₁₉-type Mn₃Ga, of which the first two correspond respectively to a hard magnetic phase and to a soft one. Decoupling effect between these two phases is found at 1ow temperature, which weakens gradually with increasing temperature and disappears above 200 K. The exchange bias (EB) effect is observed simultaneously, which is caused by the exchange coupling between the AFM shell and FM-like core. A large coercivity of 6.96 kOe (1 Oe = 79.5775 A·m^-1) and a maximum EB value of 0.45 kOe are achieved at 300 K and 200 K respectively.

Keywords: nanoparticle core-shell structure exchange coupling

Received: 04 September 2013
Revised: 20 March 2014
Accepted manuscript online:

PACS:	75.75.-c	(Magnetic properties of nanostructures)
	71.70.Gm	(Exchange interactions)

Fund: Projected supported by the National Basic Research Program of China (Grant No. 2010CB934603), the National High Technology Research and Development Program of China (863 Program) (Grant No. 2011AA03A402), and the National Natural Science Foundation of China (Grant Nos. 50931006, 51271177, and 51271179).

Corresponding Authors: Liu Wei
E-mail: wliu@imr.ac.cn

Cite this article:

Feng Jun-Ning (冯俊宁), Liu Wei (刘伟), Geng Dian-Yu (耿殿禹), Ma Song (马嵩), Yu Tao (余涛), Zhao Xiao-Tian (赵晓天), Dai Zhi-Ming (代志明), Zhao Xin-Guo (赵新国), Zhang Zhi-Dong (张志东) Large coercivity and unconventional exchange coupling in manganese-oxide-coated manganese–gallium nanoparticles 2014 Chin. Phys. B 23 087503

[1]	Herbst J F 1991 Rev. Mod. Phys. 163 819
[2]	Coey J M D 2002 J. Magn. Magn. Mater. 248 441
[3]	U.S. Department of Energy, Critical Materials Strategy, 2011
[4]	Editorial 2011 Nat. Mater. 10 157
[5]	Koch A J J, Hokkeling P, Steeg M G and Vos K J 1960 J. Appl. Phys. 31 S75
[6]	Zhu L J, Nie S H, Meng K K, Pan D, Zhao J H and Zheng H Z 2012 Adv. Mater. 24 4547
[7]	Mizukami S, Wu F, Sakuma F, Walowski J, Watanabe D, Kubota T, Zhang X, Naganuma H, Oogane M, Ando Y and Miyazaki T 2011 Phys. Rev. Lett. 106 117201
[8]	Mizukami S, Kubota T, Wu F, Zhang X, Miyazaki T, Naganuma H, Oogane M, Sakuma A and Ando Y 2012 Phys. Rev. B 85 014416
[9]	Sakuma A 1998 J. Magn. Magn. Mater. 187 105
[10]	Balke B, Fecher G H, Winterlik J and Felser C 2007 Appl. Phys. Lett. 90 152504
[11]	Winterlik J, Balke B, Fecher G H, Felser C, Alves M C M, Bernardi F and Morais J 2008 Phys. Rev. B 77 054406
[12]	Zha C L, Dumas R K, Lau J W, Mohseni S M, Sani S R, Golosovsky I V, Monsen A F, Nogués J and Åkerman J 2011 J. Appl. Phys. 110 093902
[13]	Feng W, Thiet D V, Dung D D, Shin Y and Cho S 2010 J. Appl. Phys. 108 113903
[14]	Tanaka M, Harbison J P, DeBoeck J, Sands T, Philips B, Cheeks T L and Keramidas V G 1993 Appl. Phys. Lett. 62 1565
[15]	Kurt H, Rode K, Venkatesan M, Stamenov P and Coey J M D 2011 Phys. Rev. B 83 040205
[16]	Heikes R R 1955 Phys. Rev. 99 446
[17]	Saito T and Nishimura R 2012 J. Appl. Phys. 112 083901
[18]	Zhang Z D 2007 J. Mater. Sci. Technol. 23 1
[19]	Tsuboya I and Sugihara M 1963 J. Phys. Soc. Jpn. 18 1096
[20]	Kübler J 2006 J. Phys.: Condens. Matter 18 9795
[21]	Niida H, Hori T and Nakagawa Y 1983 J. Phys. Soc. Jpn. 52 1512
[22]	Yusuf S M, Manna P K, Shirolkar M M, Kulkarni S K, Tewari R and Dey G K 2013 J. Appl. Phys. 113 173906
[23]	Si P Z, Brück E, Zhang Z D, Tegus O, Zhang W S, Buschow K H J and Klaasse J C P 2005 Mater. Res. Bull. 40 29

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Large coercivity and unconventional exchange coupling in manganese-oxide-coated manganese–gallium nanoparticles

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