CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Spin-Wave Modes in Exchange-Coupled FePt/FeNi Bilayer Films |
LI Shu-Fa1**, HE Pan2, CHENG Chu-Yuan1, ZHOU Shi-Ming2**, LAI Tian-Shu1** |
1State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275 2Department of Physics, Tongji University, Shanghai 200092
|
|
Cite this article: |
LI Shu-Fa, HE Pan, CHENG Chu-Yuan et al 2014 Chin. Phys. Lett. 31 017502 |
|
|
Abstract A simple magnetic modulation structure of the exchange-coupling FePt/FeNi bilayer film is fabricated and studied for its magnetization dynamics using time-resolved magneto-optical polar Kerr spectroscopy. It is found that two spin-wave modes can be excited. One is fixed at ~3.2 GHz in frequency for any external field and may serve as a frequency-stabilized spin-wave filter, while the other is external field dependent. In contrast, only the external field-dependent mode is excited in single-layer FeNi, supporting the localized origin of the mode at ~3.2 GHz, which is confined to a thin exchange-coupling region. The other external field-dependent mode in frequency is attributed to the Kittel mode.
|
|
Received: 22 August 2013
Published: 28 January 2014
|
|
|
|
|
|
[1] Kostylev M P, Serga A A, Schneider T, Leven B and Hillebrands B 2005 Appl. Phys. Lett. 87 153501 [2] Schneider T, Serga A A, Leven B, Hillebrands B, Stamps R L and Kostylev M P 2008 Appl. Phys. Lett. 92 022505 [3] Demidov V E, Demokritov S O, Rott K, Krzysteczko P and Reiss G 2008 Appl. Phys. Lett. 92 232503 [4] Demidov V E, Jersch J, Demokritov S O, Rott K, Krzysteczko P and Reiss G 2009 Phys. Rev. B 79 054417 [5] Kim S K, Lee K S and Han D S 2009 Appl. Phys. Lett. 95 082507 [6] Bai L H, Kohda M and Nitta J 2011 Appl. Phys. Lett. 98 172508 [7] Lenk B, Ulrichs H, Garbs F and Münzenberg M 2011 Phys. Rep. 507 107 [8] Ulrichs H, Lenk B and Münzenberg M 2010 Appl. Phys. Lett. 97 092506 [9] Neusser S, Botters B, Becherer M, Schmitt-Landsiedel D and Grundler K 2008 Appl. Phys. Lett. 93 122501 [10] Gubbiotti G, Conti M, Garlotti G, Candeloro P, Fabrizio E D, Guslienko K Y, Andre A, Bayer C and Slavin A N 2004 J. Phys.: Condens. Matter 16 7709 [11] Mendach S, Podbielski J, Topp J, Hansen W and Heitmann D 2008 Appl. Phys. Lett. 93 262501 [12] Jiang W, Wang W, Zhang F, Jiang Y and Guo A B 2008 Phys. Status Solidi B 245 1196 [13] Monteiro P M S and Schmool D S 2010 Phys. Rev. B 81 214439 [14] Zhang Z Z, Cui B Y, Wang G Z, Ma B, Jin Q Y and Liu Y W 2010 Appl. Phys. Lett. 97 172508 [15] Weller D, Moser A, Folks L, Best M E, Lee W, Toney M F, Chwickert M S, Thiele J U and Doerner M F 2000 IEEE Trans. Magn. 36 10 [16] Liu X D, Xu Z, Gao R X, Hu H N, Chen Z F, Wang Z X, Du J, Zhou S M and Lai T S 2008 Appl. Phys. Lett. 92 232501 [17] Hellwig O, Kortright J B, Takano K and Fullerton Eric E 2000 Phys. Rev. B 62 11694 [18] Kruglyak V V, Barman A, Hicken R J, Childress J R and Katine J A 2005 Phys. Rev. B 71 220409 [19] Kalinikos B A and Slavin A N 1986 J. Phys. C 19 7013 [20] Talbayev D, Zhao H, Lüpke G, Venimadhav A and Li Q 2006 Phys. Rev. B 73 014417 [21] Liu Z G, Giesen F, Zhu X B, Sydora R D and Freeman M R 2007 Phys. Rev. Lett. 98 087201 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|