溅射FePt(BN,Re,C)电影,这里的氮化硼(BN),与参考样品FePt(BN,Ag,C).本质上,这些薄膜显示了高各向异性场(Hk)和垂直磁晶各向异性(Ku),尽管参考样本显示出较高的值(Hk=69.5kOe,Ku=1.74×107erg/cm3)比FePt(BN,Re,C)胶卷(Hk=66.9kOe,Ku=1.46×107erg/cm3)。然而,各向异性常数(K2/K1)比率的微小差异在切换场的角度依赖性方面呈现接近的趋势。本质上,参考样品的平面外矫顽力为32kOe,也高于FePt(BN,Re,C)胶片(Hc=27kOe),两种薄膜均呈现较低的剩磁(Mr(平行)/Mr(垂直)=0.08~0.12),也就是说,垂直磁各向异性的指数。两种薄膜的垂直磁化强度较高是由于高度(001)纹理化的FePt薄膜,这也由(001)/(002)X射线衍射峰的4.1°/3.0°的紧密摇摆宽度证明,分别,和足够高的有序度。测量参考样品具有比FePt(BN,Re,C)(S=0.63)。因此,Ag偏析体显示出较强的促进FePt膜有序化的能力;然而,FePt(BN,Re,C)薄膜在没有Ag掺杂的情况下仍具有相当的磁性。从表面和元素组成分析,在FePt晶格中发现的金属Re原子导致过渡金属Fe(3d电子)和重金属(Re,Pt)(5d电子)与我们进行了高磁晶各向异性(Ku)。以上是低阶FePt(BN,Re,C)胶片仍具有足够高的Ku和平面外Hc。关于微观结构,参考样品和FePt(BN,Re,C)呈粒状结构和柱状晶粒,平均晶粒尺寸和分布分别为6.60nm(12.5%)和11.2nm(15.9%)。晶界的平均宽度和柱状晶粒高度的纵横比为2.05nm,1.00nm,2.35nm,和1.70nm,分别。
A sputtered FePt(BN, Re, C) film, here boron nitride (BN), was compared to a reference sample FePt(BN, Ag, C). Intrinsically, these films illustrate a high anisotropy field (Hk) and perpendicular magnetocrystalline anisotropy (Ku),although the reference sample shows a higher value (Hk = 69.5 kOe, Ku = 1.74 × 107 erg/cm3) than the FePt(BN, Re, C) film (Hk = 66.9 kOe, Ku = 1.46 × 107 erg/cm3). However, the small difference in the anisotropy constant (K2/K1) ratio presents a close tendency in the angular dependence of the switching field. Extrinsically, the out-of-plane coercivity for the reference sample is 32 kOe, which is also higher than the FePt(BN, Re, C) film (Hc = 27 kOe), and both films present lower remanence (Mr(parallel)/Mr(perpendicular) = 0.08~0.12), that is, the index for perpendicular magnetic anisotropy. The higher perpendicular magnetization for both films was due to highly (001) textured FePt films, which was also evidenced by the tight rocking width of 4.1°/3.0° for (001)/(002) X-ray diffraction peaks, respectively, and high-enough ordering degree. The reference sample was measured to have a higher ordering degree (S = 0.84) than FePt(BN, Re, C) (S = 0.63). As a result, the Ag segregant shows stronger ability to promote the ordering of the FePt film; however, the FePt(BN, Re, C) film still has comparable magnetic properties without Ag doping. From the surface and elemental composition analysis, the metallic Re atoms found in the FePt lattice result in a strong spin-orbital coupling between transition metal Fe (3d electron) and heavy metals (Re, Pt) (5d electron) and we conducted high magnetocrystalline anisotropy (Ku). Above is the explanation that the lower-ordered FePt(BN, Re, C) film still has high-enough Ku and out-of-plane Hc. Regarding the microstructure, both the reference sample and FePt(BN, Re, C) show granular structure and columnar grains, and the respective average grain size and distributions are 6.60 nm (12.5%) and 11.2 nm (15.9%). The average widths of the grain boundaries and the aspect ratio of the columnar grain height are 2.05 nm, 1.00 nm, 2.35 nm, and 1.70 nm, respectively.