Enhancement of (BH)max in a hard-soft-ferrite nanocomposite using exchange spring mechanism

被引：118

作者：

Roy, Debangsu ^{[1
]}

Kumar, P. S. Anil ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 07期

关键词：

HIGH-ENERGY PRODUCT; MAGNETIC-PROPERTIES; PERMANENT-MAGNETS; COERCIVITY; PARTICLES;

D O I：

10.1063/1.3213341

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have observed the exchange spring behavior in the soft (Fe3O4)-hard (BaCa2Fe16O27)-ferrite composite by tailoring the particle size of the individual phases and by suitable thermal treatment of the composite. The magnetization curve for the nanocomposite heated at 800 degrees C shows a single loop hysteresis showing the existence of the exchange spring phenomena in the composite and an enhancement of 13% in (BH)(max) compared to the parent hard ferrite (BaCa2Fe16O27). The Henkel plot provides the proof of the presence of the exchange interaction between the soft and hard grains as well as its dominance over the dipolar interaction in the nanocomposite. (c) 2009 American Institute of Physics. [doi:10.1063/1.3213341]

引用

页数：4

共 15 条

[1] Anisotropy dependence of irreversible switching in Fe/SmCo and FeNi/FePt exchange spring magnet films -: art. no. 262503 [J].

Davies, JE ;

Hellwig, O ;

Fullerton, EE ;

Jiang, JS ;

Bader, SD ;

Zimányi, GT ;

Liu, K .

APPLIED PHYSICS LETTERS, 2005, 86 (26) :1-3

[2] Effect of strength of intergrain exchange interaction on magnetic properties of nanocomposite magnets [J].

Fukunaga, H ;

Kuma, J ;

Kanai, Y .

IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) :3235-3240

[3] REMANENZVERHALTEN UND WECHSELWIRKUNGEN IN HARTMAGNETISCHEN TEILCHENKOLLEKTIVEN [J].

HENKEL, O .

PHYSICA STATUS SOLIDI, 1964, 7 (03) :919-929

[4] A new approach for improving exchange-spring magnets [J].

Jiang, JS ;

Pearson, JE ;

Liu, ZY ;

Kabius, B ;

Trasobares, S ;

Miller, DJ ;

Bader, SD ;

Lee, DR ;

Haskel, D ;

Srajer, G ;

Liu, JP .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)

[5] Synthesis and magnetic properties of barium-calcium hexaferrite particles prepared by sol-gel and microemulsion techniques [J].

Jotania, R. B. ;

Khomane, R. B. ;

Chauhan, C. C. ;

Menon, S. K. ;

Kulkarni, B. D. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (06) :1095-1101

[6] THE EXCHANGE-SPRING MAGNET - A NEW MATERIAL PRINCIPLE FOR PERMANENT-MAGNETS [J].

KNELLER, EF ;

HAWIG, R .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3588-3600

[7] Synthesis and magnetic properties of nano Ba-hexaferrite/NiZn ferrite composites [J].

Moon, K. W. ;

Cho, S. G. ;

Choa, Y. H. ;

Kim, K. H. ;

Kim, J. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2007, 204 (12) :4141-4144

[8] Top Nd-Fe-B magnets with greater than 56 MGOe energy density and 9.8 kOe coercivity [J].

Rodewald, W ;

Wall, B ;

Katter, M ;

Uestuener, K .

IEEE TRANSACTIONS ON MAGNETICS, 2002, 38 (05) :2955-2957

[9] Observation of the exchange spring behavior in hard-soft-ferrite nanocomposite [J].

Roy, Debangsu ;

Shivakumara, C. ;

Kumar, P. S. Anil .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (05) :L11-L14

[10] EXCHANGE HARDENING IN NANO-STRUCTURED 2-PHASE PERMANENT-MAGNETS [J].

SCHREFL, T ;

KRONMULLER, H ;

FIDLER, J .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1993, 127 (03) :L273-L277

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