Fig. 2. For the sample
annealed at 500 C (Fig. 2 (a)), a longitudinal magnetic anisotropy
with out-of-plane coercivity (Hc) of 2.5 kOe was found owing to a
LOF value of 0.138. Although the LOF dramatically enhances
from 0.138 to 0.88 with increasing Ta from 450 to 650 C
(Fig. 2(b)e(c)), the magnetic anisotropy barely evolves from longitudinal
to isotropic state. A significant evolution of magnetic
anisotropy from isotropic to perpendicular behavior was observed
as annealing temperature was raised up to 700 C (Fig. 2(d)). The
FePt film annealed at 700 C shows excellent PMA with out-ofplane
Hc of 9.1 kOe and in-plane Hc of 1.6 kOe. The in-plane MH
loop exhibits a slight hysteresis at low applied field owing to the caxis
distribution in the perpendicular direction. For the highest Ta of
800 C, an excellent PMA with out-of-plane Hc of 10.0 kOe and inplane
Hc of 0.1 kOe was achieved. The (001) textured L10-FePt film
with Ts ¼ 800 C exhibited a high perpendicularanisotropy of 2.7 ± 1.3 107 erg/cm3, based on the results published
elsewhere [20]. One may notice that the significant change in
LOF and S occurs at 500e550 C, which seems to be inconsistent
with the change in magnetic anisotropy (around 700 C). To fully
analyze the variation in texture quantitatively, the pole figure is
required to obtain the orientation distribution of crystalline lattice
from all directions of a material. However, this is a time-consuming
and difficult technique for thin film materials with thicknesses less
than 10 nm. The semi-quantitative LOF provide the texture distribution
only along the normal direction of the FePt films. One the
other hand, the magnetic anisotropy of FePt strongly depends on
the easy axis distribution. In some cases, the FePt thin films with
high LOF values barely exhibited a magnetically isotropic state due
to the wide distribution of easy axis [12,21,22]. Because the magnetic
anisotropy is much sensitive to the c-axis distribution than
the LOF, the discrepancy between magnetic properties and LOF on
Ts occurs.
Fig. 2 견본.500만 Fig 어닐링 C (A). (A), 2 longitudinal 자기이방성과 out-of-plane coercivity (Hc) 으로 까지 한 2.5 kOe 발견비록 LOF value of 0.138 LOF dramatically enhances.이 조교 까지 0.88 및 날로 늘어나다 0.138 에서 C 까지 650 4502 Fig. (B) (E) (C) 는 longitudinal barely evolves 자기이방성그래, 등방성 있는 자성 상태. A 최소 현저한 진화.에서 등방성 비등방성, 수직 관찰할 행위는로서 어닐링 온도가 높은 달자씨 700 raised C 예 (D). (Fig 2). "지금 700 C 막 어닐링 FePt PMA 및 우량 out-ofplane 응집Hc of 9.1 kOe 및 in-plane Hc 1.6 in-plane kOe) MH.한 가벼운 히스테리시스 루프 exhibits 때문에 지금 적용하기 caxis 낮은 장분포 세로 방향 나뉜다.좋은 800 C, out-of-plane PMA 및 10 kOe 및 inplane Hc of네. Hc 0.1 kOe) 이루어졌다 L10-FePt textured 지금 (001)과 같은 높은 exhibited 800 C Â ¼ Â ± 체크 perpendicularanisotropy of 2.7 107 기반 erg / 처리됩니다. 지금 결과 발표elsewhere 20]. [하루 시간 은 최소 현저한 변화는지금 C, S occurs LOF 500e550 이 inconsistent 것 같다지금 자기이방성 변화 와 "완전히 700 C).지금 quantitatively analyze, 텍스쳐 변화가 매우 도형얻는 크리스털 대한 수정 및 위치 필요하다.하나 는 모든 방향 재료. 그러나 이것은 하나의 time-consuming박막 재료 및 기술 과 thicknesses 어려움이 없다.semi-quantitative 보다 열 해리 LOF 제공하는 텍스처 분포도한 정상적인 방향 하나만 films FePt.다른 FePt 자기이방성 강력히 달려 있다한 쉽게 및 축. 특정 상황에서 및 FePt films 여위다하나의 높은 LOF values barely exhibited magnetically 등방성 상태 때문에.간단한 분포 까지 축의 자기, 12,21,22] [. 때문에이방성 더 민감하다, 더 c 축 분포 까지LOF 사이의 속성 을 discrepancy LOF, 자성occurs TS.
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