Morphological change in FePt nanogranular films induced by irradiation with 100 keV He ions

被引：7
作者：
Matsumura, S [1 ]
Horiuchi, T
Yasuda, K
Kaneko, K
Watanabe, M
Masumoto, T
机构：
[1] Kyushu Univ, Dept Appl Quantum Phys & Nucl Engn, Fukuoka 8128581, Japan
[2] Kyushu Univ, Dept Mat Sci & Engn, Fukuoka 8128581, Japan
[3] Kyushu Univ, HVEM Lab, Fukuoka 8128581, Japan
[4] Res Inst Elect & Magnet Mat, Sendai, Miyagi 9820807, Japan
来源：
SCRIPTA MATERIALIA | 2005年 / 53卷 / 04期
关键词：
ion-beam processing; magnetic recording thin films; nanocrystalline microstructures; phase transformation kinetics; irradiation effects;
D O I：
10.1016/j.scriptamat.2005.04.044
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have investigated the effects of He-ion irradiation on structures of FePt nanoparticles dispersed in thin films with amorphous Al2O3 matrix. The coarsening of FePt nanoparticles is suppressed under irradiation with 100 keV He+ ions at an elevated temperature, such as 923 K. The delay of particle growth is also recognized in the post-irradiation annealing. On the other hand, He-irradiation is of little assistance in promoting L1(0) ordering in the nanogranular films at a temperature as low as 573 K. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：441 / 445
页数：5
相关论文
共 14 条
[1]   Theoretical consideration of the stability of an L10 magnetic phase in Fe-(Pd, Pt) alloy clusters [J].
Fukami, S ;
Tanaka, N .
PHILOSOPHICAL MAGAZINE LETTERS, 2004, 84 (01) :33-40
[2]   Effects of Ag underlayers on the microstructure and magnetic properties of epitaxial FePt thin films [J].
Hsu, YN ;
Jeong, S ;
Laughlin, DE ;
Lambeth, DN .
JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :7068-7070
[3]   Media for 10 Gb/in(2) hard disk storage: Issues and status [J].
Lambeth, DN ;
Velu, EMT ;
Bellesis, GH ;
Lee, LL ;
Laughlin, DE .
JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) :4496-4501
[4]   Structural and magnetic properties of FePt:SiO2 granular thin films [J].
Luo, CP ;
Sellmyer, DJ .
APPLIED PHYSICS LETTERS, 1999, 75 (20) :3162-3164
[5]   Reduction of ordering temperature of an FePt-ordered alloy by addition of Cu [J].
Maeda, T ;
Kai, T ;
Kikitsu, A ;
Nagase, T ;
Akiyama, J .
APPLIED PHYSICS LETTERS, 2002, 80 (12) :2147-2149
[6]   Kinetics of irradiation-induced phase transformations in tricritical systems [J].
Matsumura, S ;
Muller, S ;
Abromeit, C .
PHYSICAL REVIEW B, 1996, 54 (09) :6184-6193
[7]   Microstructures of FePt-Al-O and FePt-Ag nanogranular thin films and their magnetic properties [J].
Ping, DH ;
Ohnuma, M ;
Hono, K ;
Watanabe, M ;
Iwasa, T ;
Masumoto, T .
JOURNAL OF APPLIED PHYSICS, 2001, 90 (09) :4708-4716
[8]   Chemical order induced by ion irradiation in FePt (001) films [J].
Ravelosona, D ;
Chappert, C ;
Mathet, V ;
Bernas, H .
APPLIED PHYSICS LETTERS, 2000, 76 (02) :236-238
[9]   Influence of the buffer layers on magnetic properties of FePt(001) films sputter-deposited at reduced temperature [J].
Seki, T ;
Shima, T ;
Takanashi, K ;
Takahashi, Y ;
Matsubara, E ;
Takahashi, YK ;
Hono, K .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (02) :1127-1132
[10]   Nanostructured magnetic films for extremely high density recording [J].
Sellmyer, DJ ;
Yu, M ;
Kirby, RD .
NANOSTRUCTURED MATERIALS, 1999, 12 (5-8) :1021-1026
12