Evolution of structural and magnetic properties of FePtCu alloy films on annealing of FePt/Cu multilayers

被引：4

作者：

Basha, M. A. ^{[1
,2
]}

Bhatt, Harsh ^{[1
,2
]}

Kumar, Yogesh ^{[1
]}

Prajapat, C. L. ^{[2
,3
]}

Gupta, M. ^{[4
]}

Karki, V ^{[5
]}

Ghosh, S. K. ^{[2
,6
]}

Basu, S. ^{[1
,2
]}

Singh, Surendra ^{[1
,2
]}

机构：

[1] Bhabha Atom Res Ctr, Solid State Phys Div, Mumbai 400085, Maharashtra, India

[2] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[3] Bhabha Atom Res Ctr, Tech Phys Div, Mumbai 400085, Maharashtra, India

[4] UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452017, India

[5] Bhabha Atom Res Ctr, Fuel Chem Div, Mumbai 400085, Maharashtra, India

[6] Bhabha Atom Res Ctr, Mat Proc & Corros Engn Div, Mumbai 400085, Maharashtra, India

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2020年 / 22卷 / 28期

关键词：

X-RAY; NANOPARTICLES; PHASE; ELECTROCATALYSIS; SURFACE; CU;

D O I：

10.1039/d0cp02484h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin films of ternary (FePt)(100-x)Cu(x)alloys were obtained by annealing of FePt (100 angstrom)/Cu (d angstrom) multilayers withd= 50 and 100 angstrom deposited by sputtering at room temperature on Si substrates. The evolution of structural and magnetic properties of these multilayers induced by isochronal and isothermal annealing in a vacuum has been studied using depth dependent characterization techniques. Isochronal annealing for 0.5 h at different temperatures (300 to 600 degrees C) showed very low interdiffusion at the interfaces with no signature of alloy phase formation. However, isothermal annealing of multilayers at 600 degrees C for longer times (1.5-6.5 h) showed significantly large interdiffusion accompanied by the formation of polycrystalline ternary alloy and iron silicide phases. The iron silicide formed at the substrate-film interface assists the growth of theL1(0)ordered ternary alloy phase, which showed different stoichiometry for different multilayers. TheL1(0)phase formed with higher Cu content showed drastically different magnetic properties with a reduction in saturation magnetization and an increase in coercivity (similar to 6 kOe) at room temperature. The iron silicide formed on high temperature annealing showed ferromagnetic nature with a magnetization of similar to 140 emu cm(-3)at room temperature.

引用

页码：16107 / 16116

页数：10

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