Influence of a helical anisotropy profile on the static and dynamic properties of a soft magnetic layer

被引：11

作者：

Gloanec, M. ^{[1
]}

Dubourg, S. ^{[1
]}

Acher, O. ^{[2
]}

Duverger, F. ^{[1
]}

Plessis, D. ^{[1
]}

Bonneau-Brault, A. ^{[1
]}

机构：

[1] Lab Mat Opt & Magnet, CEA Le Ripault, F-37260 Monts, France

[2] HORIBA Jobin Yvon SAS, F-91380 Chilly Mazarin, France

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 09期

关键词：

FERROMAGNETIC THIN-FILMS; MICROWAVE PERMEABILITY SPECTRA; UNIAXIAL ANISOTROPY; LOCAL ANISOTROPY; DISPERSION; RIPPLE; GHZ;

D O I：

10.1103/PhysRevB.85.094433

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The static and dynamic properties of a soft magnetic layer presenting a helical anisotropy profile have been studied both experimentally and theoretically with the help of one-dimensional (1D) micromagnetic calculations. The aim is to investigate the possibility of achieving an evanescent anisotropy by randomizing the effective anisotropy thanks to a continuous rotation of the samples during a growth process. A general method to evaluate the magnetization dispersion based on the angular measurement of the complex permeability spectra and on the determination of the integral criterion is presented. The maximum randomization of the magnetization in Co86Nb10.5Zr3.5 layers is found for the sample rotated 1/2 turn. A significant decrease of the effective anisotropy from 15 to 7 Oe is obtained. The 1D simulations give a good explanation and description of the angular dispersive behavior of the magnetization observed as a function of the rotation speed imposed during growth. However, a discrepancy between measured and calculated resonance frequencies is observed and attributed to short-range fluctuations of the magnetization known as the ripplelike phenomenon. Compared to literature, this effect is particularly strong for a high rotation speed.

引用

页数：8

共 34 条

[1] Bounds on the dynamic properties of magnetic materials [J].

Acher, O ;

Adenot, AL .

PHYSICAL REVIEW B, 2000, 62 (17) :11324-11327

[2] Generalization of Snoek's law to ferromagnetic films and composites [J].

Acher, O. ;

Dubourg, S. .

PHYSICAL REVIEW B, 2008, 77 (10)

[3] Magnetic characterization of exchange-coupled thin films having competing anisotropies [J].

Alvarez-Prado, L. M. ;

Alameda, J. M. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 316 (02) :E872-E875

[4] Efficient dynamic magnetization measurement in a Py/Ru/Py trilayer [J].

Bonneau-Brault, A. ;

Dubourg, S. ;

Dubuget, V. ;

Plessis, D. ;

Duverger, F. .

JOINT EUROPEAN MAGNETIC SYMPOSIA (JEMS), 2011, 303

[5] The role of local anisotropy in the origin of in-plane uniaxial anisotropy in amorphous CoZrNd thin films [J].

Calleja, JF ;

Contreras, MC ;

Rivas, M ;

Corrales, JA ;

Suran, G ;

Ouahmane, H .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 152 (1-2) :17-21

[6] Comparison of the in-plane magnetic anisotropy dispersion obtained using transverse biased initial susceptibility technique performed by magnetooptical Kerr effect and ferromagnetic resonance technique:: The role of the large angle ripple [J].

Calleja, JF ;

Gutiérrez, MO ;

Suran, G ;

Corrales, JA ;

Contreras, C .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 1998, 37 (12A) :6384-6389

[7] Adjust the resonance frequency of (Co90Nb10/Ta)n multilayers from 1.4 to 6.5 GHz by controlling the thickness of Ta interlayers [J].

Chai, Guozhi ;

Yang, Yuancai ;

Zhu, Jingyi ;

Lin, Min ;

Sui, Wenbo ;

Guo, Dangwei ;

Li, Xiling ;

Xue, Desheng .

APPLIED PHYSICS LETTERS, 2010, 96 (01)

[8] Exploration of artificial multiferroic thin-film heterostructures using composition spreads [J].

Chang, KS ;

Aronova, MA ;

Lin, CL ;

Murakami, M ;

Yu, MH ;

Hattrick-Simpers, J ;

Famodu, OO ;

Lee, SY ;

Ramesh, R ;

Wuttig, M ;

Takeuchi, I ;

Gao, C ;

Bendersky, LA .

APPLIED PHYSICS LETTERS, 2004, 84 (16) :3091-3093

[9] Driven-voltage permeability variation measurements of bilayered magnetostrictive/piezoelectric materials &for tunable microwave applications [J].

De Blasi, S. ;

Queffelec, P. ;

Dubourg, S. ;

Bodin, O. ;

Ledieu, M. .

IEEE TRANSACTIONS ON MAGNETICS, 2007, 43 (06) :2651-2653

[10] INDUCED ANISOTROPY OF AMORPHOUS COFESIB AND CONBZR MAGNETIC-MATERIALS [J].

DEWIT, HJ ;

WITMER, CHM ;

DIRNE, FWA .

IEEE TRANSACTIONS ON MAGNETICS, 1987, 23 (05) :2123-2127

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