Finding stabilized coercivity in a study of thickness and temperature dependent Co/Ag/Ge(001) ultrathin films

Su, C. W.; Tsay, Jyh-Jong; Yao, Y. D.

doi:10.1016/j.tsf.2007.07.185

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…Macroscopic magnetic experiments were also conducted using MOKE measurements. The MOKE procedures used in our studies have also been previously described elsewhere (Su, ; Su, et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…The magnetic domains in a magnetic film are separated by domain walls with approximate thicknesses of several hundred atomic layers. In the research into the physical characteristics of magnetic films, the magneto‐optic Kerr effect (MOKE) (Arora et al, ; Kim et al, ; Pathak & Sharma, ; Su, ; Su, et al, ; Westphalen et al, ) is a well‐established and commonly used analytical tool. The MOKE primarily measures the magnetic hysteresis loop of a magnetic film.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic domain imaging of nano-magnetic films using magnetic force microscopy with polar and longitudinally magnetized tips

Chen

Chang

et al. 2016

Microsc. Res. Tech.

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Perpendicular or parallel magnetic fields are used to magnetize the tips used in magnetic force microscopy (MFM). In this process, perpendicular or parallel magnetic dipole moments are produced on the tip plane, thus leading to the formation of polar magnetized tips (PM-tips) or longitudinally magnetized tips (LM-tips), respectively. The resolution of an MFM image of a magneto-optic disk is used for calibration of these tips, and the saturated magnetic fields of the PM- and LM-tips are found to be 2720 Oe and 680 Oe, respectively. Because both tips can simultaneously magnetize the sample during the scanning process when measuring a Co thin film, clear MFM images are captured, which enable the identification of magnetizable regions and the distribution of the magnetic domains on the sample surface. These results will be useful for improving the manufacturing processes required for soft nano-magnetic film production.

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“…Macroscopic magnetic experiments were also conducted using MOKE measurements. The MOKE procedures used in our studies have also been previously described elsewhere (Su, ; Su, et al, ).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic domain imaging of nano-magnetic films using magnetic force microscopy with polar and longitudinally magnetized tips

Chen

Chang

et al. 2016

Microsc. Res. Tech.

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“…is intrinsic coercivity without thermal agitation, is the Boltzmann's constant, is attempt frequency, is time of hysteresis measurement, and is energy barrier at zero field. The value of is taken as 2/3 by assuming slightly unaligned particles [47,48]. The attempt frequency and the hysteresis measurement time are taken as 10 10 Hz and 1 second, respectively.…”

Section: Magnetic Properties Of Fept Filmsmentioning

confidence: 99%

High Temperature Magnetic Properties of Indirect Exchange Spring FePt/M(Cu,C)/Fe Trilayer Thin Films

Gayen

Biswas

Singh

et al. 2013

Journal of Nanomaterials

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We report the investigation of temperature dependent magnetic properties of FePt and FePt(30)/M(Cu,C)/Fe(5) trilayer thin films prepared by using magnetron sputtering technique at ambient temperature and postannealed at different temperatures.L10ordering, hard magnetic properties, and thermal stability of FePt films are improved with increasing postannealing temperature. In FePt/M/Fe trilayer, the formation of interlayer exchange coupling between magnetic layers depends on interlayer materials and interface morphology. In FePt/C/Fe trilayer, when the C interlayer thickness was about 0.5 nm, a strong interlayer exchange coupling between hard and soft layers was achieved, and saturation magnetization was enhanced considerably after using interlayer exchange coupling with Fe. In addition, incoherent magnetization reversal process observed in FePt/Fe films changes into coherent switching process in FePt/C/Fe films giving rise to a single hysteresis loop. High temperature magnetic studies up to 573 K reveal that the effective reduction in the coercivity decreases largely from 34 Oe/K for FePt/Fe film to 13 Oe/K for FePt/C(0.5)/Fe film demonstrating that the interlayer exchange coupling seems to be a promising approach to improve the stability of hard magnetic properties at high temperatures, which is suitable for high-performance magnets and thermally assisted magnetic recording media.

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“…Metal-semiconductor interfaces have received much attention in the past decade because of the particular importance of developing the next-generation magnetic storage and semiconductor-based spintronics devices [1][2][3][4][5]. Considerable effort has been devoted to the study of metals on semiconductors [5][6][7][8][9][10][11][12]. There are relatively fewer reports discussing the inverse system, i.e.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of ultrathin Si/Co/Ir(111) films

Tsay¹,

Liu²

2008

J. Phys.: Condens. Matter

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A magnetic phase diagram for Si/Co/Ir(111) films has been established by the surface magneto-optic Kerr effect technique. The Si coverage, where ferromagnetism vanishes, increases from one monolayer to more than three monolayers as the coverage of the Co layer increases from two to five monolayers. As silicon is deposited on the surface of Co/Ir(111) films, Si atoms interact with the Co layer to form Si-Co compounds. The rough Si/Co interface impedes the motion of domain walls during the magnetization reversal process, thus increasing the coercive force. The formation of nonmagnetic Co-Si compounds reduces the effective magnetic layers, leading to a decrease in Kerr intensity and superparamagnetic behavior of the films.

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Finding stabilized coercivity in a study of thickness and temperature dependent Co/Ag/Ge(001) ultrathin films

Cited by 4 publications

References 29 publications

Magnetic domain imaging of nano-magnetic films using magnetic force microscopy with polar and longitudinally magnetized tips

Magnetic domain imaging of nano-magnetic films using magnetic force microscopy with polar and longitudinally magnetized tips

High Temperature Magnetic Properties of Indirect Exchange Spring FePt/M(Cu,C)/Fe Trilayer Thin Films

Magnetic properties of ultrathin Si/Co/Ir(111) films

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