A comparison of rapid-annealed FePt and FePd thin films: Internal stress, L 1 0 ordering, and texture

Hsiao, S.N.; Liu, S.H.; Chen, C.C.; Chou, C.L.; Chen, S.K.; Su, Shu-Hui; Chiu, Kuo-Feng; Sung, Cheng-Kuo

doi:10.1016/j.vacuum.2015.11.022

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…A series of (FePt) 100Àx Gd x thin films was sputter-deposited on MgO(001) substrates at 800 C. The value was chosen since previous studies 41,42 have yielded high chemical L1 0 ordering and strong PMA at this temperature for pure FePt thin films. Co-deposition of Fe, Pt, and Gd using individual targets was carried out at an Ar pressure of 5 Â 10 À3 mbar.…”

Section: Methodsmentioning

confidence: 99%

Effect of Gd addition on the structural and magnetic properties of L1-FePt alloy thin films

Schmidt

Abdulazhanov

Michalička

et al. 2022

Journal of Applied Physics

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The impact of Gd addition on the structural and magnetic properties of [Formula: see text]-FePt alloy thin films, which were sputter-deposited on MgO(001) substrates at 800[Formula: see text]C, was investigated. A rapid deterioration of [Formula: see text] chemical ordering along with a strong amorphization effect is observed with addition of Gd. At more than 20 at. % Gd, additional crystalline phases occur. Due to the diminishing [Formula: see text] chemical order, the perpendicular magnetic anisotropy (PMA) gets strongly reduced from about 3 down to 1 MJ/m[Formula: see text] with addition of 14 at. % Gd. For higher Gd concentrations, the easy axis of magnetization turns fully in-plane due to dominating magnetic shape anisotropy. Furthermore, the saturation magnetization gets reduced with Gd addition due to the antiferromagnetic coupling between the Fe and Gd magnetic moments. Also, the Curie temperature can be lowered. Interestingly, with addition of Gd, a change in film morphology takes place, changing from an isolated island structure to a more continuous film morphology, which is of particular interest for samples with low Gd concentration as these films exhibit still strong PMA but rather low coercive fields.

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Section: Methodsmentioning

confidence: 99%

Effect of Gd addition on the structural and magnetic properties of L1-FePt alloy thin films

Schmidt

Abdulazhanov

Michalička

et al. 2022

Journal of Applied Physics

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“…• C пленок твердого раствора Fe−Pt (толщина 40 nm) на стеклянных подлож-ках [13]; отжиг многослойных пленок Fe/FePt/Pt во внеш-нем магнитном поле при 478…”

Section: Introductionunclassified

Формирование атомно-упорядоченной структуры типа L1-=SUB=-0-=/SUB=- с ориентацией [001] в процессе твердофазной реакции в двухслойных тонких пленках Fe/Pd

Моисеенко¹,

Алтунин²,

Жарков³

2017

Физика Твердого Тела

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Проведены электронно-микроскопические и электронографические in situ исследования процессов фор-мирования атомно-упорядоченной структуры L1 0 -FePd при твердофазной реакции в двухслойных тонких пленках Fe/Pd. Слои железа и палладия в исходном состоянии представляли собой в основном коге-рентно ориентированные кристаллиты с ориентационным соотношением α-Fe (001) [110] Pd (001)[100]. Установлено, что твердофазная реакция между слоями железа и палладия в процессе термического нагрева со скоростью 4−8• C/min начинается с формирования твердого раствора FePd при 390• C, при 430• C наблюдается формирование атомно-упорядоченной структуры L1 0 -FePd. Показано, что при медленной скорости нагрева (4−8• C/min) структура L1 0 -FePd формируется с ориентацией [001] относительно плоскости пленки, а при быстрой скорости нагрева (50Работа выполнена при финансовой поддержке РФФИ (гранты № 14-03-00515, 16-32-00225, 16-38-60075).

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“…Several methods for forming the atomically ordered L1 0 -FePd structure with the [001] orientation were proposed, including simultaneous sputtering of iron and palladium by electron beam epitaxy onto the Pd(001) epitaxial layer grown on the MgO(001) substrate [9], cooling of the single-crystal atomically disordered FePd solid solution from 750 to 600°C at a rate of 0.1-1°C/min at a pressure of 40 MPa [10], and annealing of the singlecrystal atomically disordered FePd solid solution at temperatures of 520-540°C in magnetic field [11]. For the Fe-Pt system, the following techniques for obtaining the atomically ordered L1 0 -FePt structure with a specified orientation were proposed: annealing of polycrystalline Fe/Pt multilayers with a single layer thickness of 0.4 nm on glass substrates [12], fast heating of the 40-nm-thick Fe-Pt solid solution films on glass substrates from room temperature to 800°C at a rate of 40°C/min [13], and annealing of the Fe/FePt/Pt multilayer films at 478°C in external magnetic field [14,15]. Thus, the atomically ordered L1 0 structures in the Fe-Pd and Fe-Pt films are formed mainly from the atomically disordered state by annealing.…”

mentioning

confidence: 99%

Formation of the atomically ordered L10 structure with the [001] orientation during the solid-state reaction in Fe/Pd bilayer thin films

Altunin

Жарков

2017

Phys. Solid State

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Abstract-The formation of the atomically ordered L1 0 -FePd structure during the solid-state reaction in Fe/Pd bilayer thin films is in situ investigated by electron microscopy and electron diffraction analysis. The initial iron and palladium layers were mainly coherently oriented crystallites with the orientation relationship α-Fe (001) [110] || Pd(001) [100]. It is established that the solid-state reaction between the iron and palladium layers upon heating at a rate of 4-8°C/min starts with the formation of the FePd solid solution at 390°C; at 430°C, the formation of the atomically ordered L1 0 -FePd structure is observed. It is shown that at the low heating rate (4-8°C/min), the L1 [8]. Several methods for forming the atomically ordered L1 0 -FePd structure with the [001] orientation were proposed, including simultaneous sputtering of iron and palladium by electron beam epitaxy onto the Pd(001) epitaxial layer grown on the MgO(001) substrate [9], cooling of the single-crystal atomically disordered FePd solid solution from 750 to 600°C at a rate of 0.1-1°C/min at a pressure of 40 MPa [10], and annealing of the singlecrystal atomically disordered FePd solid solution at temperatures of 520-540°C in magnetic field [11]. For the Fe-Pt system, the following techniques for obtaining the atomically ordered L1 0 -FePt structure with a specified orientation were proposed: annealing of polycrystalline Fe/Pt multilayers with a single layer thickness of 0.4 nm on glass substrates [12], fast heating of the 40-nm-thick Fe-Pt solid solution films on glass substrates from room temperature to 800°C at a rate of 40°C/min [13], and annealing of the Fe/FePt/Pt multilayer films at 478°C in external magnetic field [14,15]. Thus, the atomically ordered L1 0 structures in the Fe-Pd and Fe-Pt films are formed mainly from the atomically disordered state by annealing. On the other hand, one of the methods for forming the atomically ordered structures in thin films is the solid-state reaction, which, in contrast to other SURFACE PHYSICS AND THIN FILMS

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A comparison of rapid-annealed FePt and FePd thin films: Internal stress, L 1 0 ordering, and texture

Cited by 13 publications

References 26 publications

Effect of Gd addition on the structural and magnetic properties of L1-FePt alloy thin films

Effect of Gd addition on the structural and magnetic properties of L1-FePt alloy thin films

Формирование атомно-упорядоченной структуры типа L1-=SUB=-0-=/SUB=- с ориентацией [001] в процессе твердофазной реакции в двухслойных тонких пленках Fe/Pd

Formation of the atomically ordered L10 structure with the [001] orientation during the solid-state reaction in Fe/Pd bilayer thin films

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