MAGNETO-OPTICAL PROPERTIES OF (Pr,Ce)-Fe ALLOY COATED TbFeCo ALLOY AMORPHOUS FILMS

Kanaizuka, T.; Ohwada, Takeshi; Morihara, Y.; Katayama, T.; Suzuki, Takao

doi:10.3379/jmsjmag.11.s1_333

Cited by 4 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8(a) shows, we obtained the saturated ª K values of ³0.05°and ³0.1°for the film prepared after the pre-sputtering for 3 and 60 min, respectively. The values are smaller than the reported-saturated ª K value (0.3°) 10,13) in the general TbFeCo thin film. The decrease in the saturated ª K value shown in Fig.…”

Section: Magneto-optical Propertiescontrasting

confidence: 64%

“…The polar Kerr effect of the TbFeCo thin film is generally useful for the applications at the wavelength of ³700 nm. 10,13,16) Figures 8(a) and 8(b) show the changes in ª K with regard to the external magnetic field at the incident-light wavelength of 700 nm. Figure 8(a) shows the results when the light is injected from the film surface, while it is from the backside of the glass substrate in the case of Fig.…”

Section: Magneto-optical Propertiesmentioning

confidence: 99%

“…According to previous reports, the reversal of the Kerr hysteresis loop is caused by several factors. Regarding the constituents of the TbFeCo thin film, (i) the amounts of 3d elements (FeCo) are dominant 10) or (ii) 4f element (Tb) is dominant. 13) Another plausible reason was (iii) the anomalous hysteresis loop induced by the inhomogeneity of the film quality.…”

Section: Magneto-optical Propertiesmentioning

confidence: 99%

“…In other words, the problems to be addressed in the TbFeCo thin film are suppression of H c¦ , ª K , and other magnetic properties owing to the oxidation of the film. To overcome these drawbacks, addition of elements 8,9) and protection layer 10) has been attempted in the TbFeCo and/or TbFe thin film systems to stabilize the perpendicular magnetic anisotropy. Another problem of this material is its high process cost because a load-lock system is necessary to achieve the ultrahigh vacuum environments to avoid the oxidation of the film.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Correlation between the Effective Amounts of Elements in TbFeCo Thin Films and Their Magnetic Properties

et al. 2019

View full text Add to dashboard Cite

In this study, TbFeCo thin films were prepared using DC-magnetron sputtering technique utilizing a conventional batch-type sputtering machine. The properties such as magnetic hysteresis loops and magneto-optical properties of the obtained films were measured. Furthermore, we precisely evaluated the "effective" amounts of elements, i.e., the amounts of constituents released by oxidation, in TbFeCo thin films. We also attempted to control the amounts of effective elements by changing the pre-sputtering condition before film preparation. This is because the presputtering process greatly affected the effective amounts of elements in the prepared TbFeCo thin films, such that the magnetic properties were drastically different from sample to sample by altering the pre-sputtering condition. Insufficient pre-sputtering led to a relatively high oxygen content in the films in comparison with those prepared with sufficient pre-sputtering. Outstanding perpendicular magnetic anisotropy in the outof-plane direction was observed in a film prepared after 60 min of pre-sputtering, which exhibited a coercivity (H c¦ ) value of 6.4 kOe from magnetic hysteresis measurements and 8.2 kOe from magneto-optical polar Kerr hysteresis measurements at an incident light of wavelength 700 nm. The saturation value of the polar Kerr rotation angle (ª K ) of this film was approximately 0.3°, which is comparable to the theoretically optimized value. Therefore, we demonstrated that high-quality TbFeCo films can be obtained with high reproducibility by using a simple batchtype sputtering machine and that there is a strong correlation between effective amounts of elements in TbFeCo thin films and their magnetic properties. [

show abstract

Section: Magneto-optical Propertiescontrasting

confidence: 64%

Section: Magneto-optical Propertiesmentioning

confidence: 99%