Tunable spin wave dynamics in two-dimensional Ni80Fe20 nanodot lattices by varying dot shape

被引：27

作者：

Mahato, Bipul Kumar ^{[1
]}

Rana, Bivas ^{[1
]}

Kumar, Dheeraj ^{[1
]}

Barman, Saswati ^{[1
]}

Sugimoto, Satoshi ^{[2
]}

Otani, YoshiChika ^{[2
,3
]}

Barman, Anjan ^{[1
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Themat Unit Excellence Nanodevice Technol, Kolkata 700098, India

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] CEMS RIKEN, Wako, Saitama 3510198, Japan

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 01期

关键词：

MAGNETIZATION REVERSAL; ANISOTROPY; CHAINS;

D O I：

10.1063/1.4890088

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate tunable spin wave spectrum in two-dimensional Ni80Fe20 nanodot lattices by varying dot shape. A single collective mode in elliptical dot lattices transforms into three distinct modes for the half-elliptical, rectangular, and diamond dot lattices, albeit with different peak frequencies and intensities. A drastic change is observed for the triangular dots, where eight modes covering a broad band are observed. Using micromagnetic simulations, we characterized the modes as different localized, extended, and quantized modes, whose frequencies and spatial profiles are determined by a combination of internal field profiles within the nanodots and the stray magnetic field within the lattice. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 30 条

[1] Large area patterned magnetic nanostructures [J].

Adeyeye, A. O. ;

Singh, N. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (15)

[2] Magnetization Reversal in Chains and Clusters of Exchange-Coupled Nickel Nanoparticles [J].

Agrawal, Milan ;

Rana, Bivas ;

Barman, Anjan .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (25) :11115-11118

[3] Magnetic domain-wall logic [J].

Allwood, DA ;

Xiong, G ;

Faulkner, CC ;

Atkinson, D ;

Petit, D ;

Cowburn, RP .

SCIENCE, 2005, 309 (5741) :1688-1692

[4] Colloquium:: Opportunities in nanomagnetism [J].

Bader, SD .

REVIEWS OF MODERN PHYSICS, 2006, 78 (01) :1-15

[5] Three-dimensional shape dependence of spin-wave modes in single FePt nanomagnets [J].

Brandt, R. ;

Ganss, F. ;

Rueckriem, R. ;

Senn, T. ;

Brombacher, C. ;

Krone, P. ;

Albrecht, M. ;

Schmidt, H. .

PHYSICAL REVIEW B, 2012, 86 (09)

[6]

Buschow K H J, 2009, HDB MAGNETIC MAT, V18, P168

[7] Simulation Studies of Nanomagnet-Based Logic Architecture [J].

Carlton, David B. ;

Emley, Nathan C. ;

Tuchfeld, Eduard ;

Bokor, Jeffrey .

NANO LETTERS, 2008, 8 (12) :4173-4178

[8] Designing nanostructured magnetic materials by symmetry [J].

Cowburn, RP ;

Koltsov, DK ;

Adeyeye, AO ;

Welland, ME .

EUROPHYSICS LETTERS, 1999, 48 (02) :221-227

[9] Configurational anisotropy in nanomagnets [J].

Cowburn, RP ;

Adeyeye, AO ;

Welland, ME .

PHYSICAL REVIEW LETTERS, 1998, 81 (24) :5414-5417

[10]

Donahue M.J., 1999, OOMMF USERS GUIDE VE

← 1 2 3 →