Excellent Low Loss Performance of Microwave Permeability in High Resistive CoFeHfO Films by Thermal Annealing

被引：13

作者：

Kim, Dong Young ^{[1
]}

Yoon, Seok Soo ^{[1
]}

Rao, B. Parvatheeswara ^{[2
,3
]}

Kim, CheolGi ^{[2
]}

Kim, Ki Hyeon ^{[4
]}

Takahashi, M. ^{[5
]}

机构：

[1] Andong Natl Univ, Dept Phys, Andong 760764, Kyoungsangbuk D, South Korea

[2] Chungnam Natl Univ, Dept Mat Engn, Taejon 305764, South Korea

[3] Andhra Univ, Dept Phys, Visakhapatnam 530003, Andhra Pradesh, India

[4] Yeungnam Univ, Dept Phys, Gyongsan 712749, South Korea

[5] Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 11期

关键词：

Amorphous; CoFeHfO; low loss; microwave permeability;

D O I：

10.1109/TMAG.2008.2001627

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper reports on the thermal field annealing effect of microwave permeabilities in CoFeHfO thin films. For the high resistive optimized Co19Fe53Hf8O20 thin films annealed at 150 degrees C, apart from excellent magnetic performance very low Gilbert damping constants (alpha < 0.017) are obtained up to film thickness of 437 nm. The results are interpreted in terms of changes in microstructure leading to structural relaxation effect and evolution of nanocrystalline Co(Fe) precipitates out of thermal field annealing. These materials with excellent low loss performance are obviously the most promising candidates for microwave device applications.

引用

页码：3115 / 3118

页数：4

共 19 条

[1] Structural and magnetic properties of oxide films CoFeHfO: A possible candidate for all-oxide TMR junctions? [J].

Esseling, M ;

Luo, Y ;

Samwer, K .

EUROPHYSICS LETTERS, 2004, 68 (01) :100-105

[2] Approach to magnetic losses and their frequency dependence in Mn-Zn ferrites [J].

Fiorillo, F. ;

Beatrice, C. ;

Bottauscio, O. ;

Manzin, A. ;

Chiampi, M. .

APPLIED PHYSICS LETTERS, 2006, 89 (12)

[3] Nanostructured magnetic Fe-Ni-Co/Teflon multilayers for high-frequency applications in the gigahertz range [J].

Greve, Henry ;

Pochstein, Christian ;

Takele, Haile ;

Zaporojtchenko, Vladimir ;

Faupel, Franz ;

Gerber, Andreas ;

Frommberger, Michael ;

Quandt, Eckhard .

APPLIED PHYSICS LETTERS, 2006, 89 (24)

[4] Novel nanostructure and magnetic properties of Co-Fe-Hf-O films [J].

Ha, Nguyen Duy ;

Phan, Manh-Huong ;

Kim, Chong Oh .

NANOTECHNOLOGY, 2007, 18 (15)

[5] Nanostructure and excellent magnetic properties of Co19.35Fe53.28Hf7.92O19.35 films [J].

Ha, Nguyen Duy ;

Kim, Cheol Gi ;

Kim, Chong Oh ;

Phan, Manh-Huong .

SOLID STATE COMMUNICATIONS, 2007, 141 (09) :502-505

[6] High resistive nanocrystalline Fe-M-O (M=Hf, Zr, rare-earth metals) soft magnetic films for high-frequency applications [J].

Hayakawa, Y ;

Makino, A ;

Fujimori, H ;

Inoue, A .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :3747-3752

[7] High-frequency permeability of soft-magnetic Fe-Hf-O films with high resistivity [J].

Huijbregtse, J ;

Roozeboom, F ;

Sietsma, J ;

Donkers, J ;

Kuiper, T ;

van de Riet, E .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (03) :1569-1574

[8] High-frequency magnetic properties of W-type barium-ferrite BaZn2-xCoxFe16O27 composites [J].

Li, ZW ;

Chen, LF ;

Ong, CK .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (09) :5918-5924

[9] Reduce the start current of Smith-Purcell backward wave oscillator by sidewall grating [J].

Lia, D. ;

Imasaki, K. ;

Gao, X. ;

Yang, Z. ;

Park, Gun-Sik .

APPLIED PHYSICS LETTERS, 2007, 91 (22)

[10] Ni-Zn ferrite films with high permeability (μ′=∼30, μ"=∼30) at 1 GHz prepared at 90 °C [J].

Matsushita, N ;

Chong, CP ;

Mizutani, T ;

Abe, M .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :7376-7378

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