Ion Bean Deposition of Multilayer Magnetic Films

1991 ◽  
Vol 223 ◽  
Author(s):  
Masakatsu Senda
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Ion Beam ◽  
Uniaxial Anisotropy ◽  
Magnetic Films ◽  
Multilayer Films ◽  
Single Element ◽  
Soft Magnetic Properties ◽  
Magnetic Multilayer ◽  
Soft Magnetic

ABSTRACTThis work investigates the modification of Fe based ion beam sputtered magnetic multilayer films in order to realize good soft-magnetic properties. Fe is used as the main magnetic material because it is the single element with the highest saturation magnetization. Then, I attempt to obtain Fe with zero magnetostriction and soft-magnetic properties artificially using a multilayering technique, while maintaining the highest possible saturation magnetization. Magnetostriction is changed by one of two following causes: by a change in the balance between positive and negative magnetostriction layers, as seen in for example Fe/Co film, or by a change in crystal orientation, as seen in for example Fe/Si02 film. Multilayer film with positive and negative magnetostriction layers is confirmed to show the same inverse magnetostrictive effect as that in uniform film. Also, the small crystal grains and the magnetostatic coupling cause a decrease in anisotropy dispersion, and lead to soft-magnetic properties, in the multilayer films. Additionally, the minimum coercivity in Fe/ SiO2 film corresponds well to the maximum in-plane uniaxial anisotropy and the minimum perpendicular anisotropy where magnetization is restricted almost completely in the plane.

scholarly journals Effects of La on Thermal Stability, Phase Formation and Magnetic Properties of Fe–Co–Ni–Si–B–La High Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1907
Author(s):  
Jiaming Li ◽  
Jianliang Zuo ◽  
Hongya Yu
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Phase Formation ◽  
Crystallization Temperature ◽  
High Entropy Alloys ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
High Entropy ◽  
Bcc Phase

The microstructure, phase formation, thermal stability and soft magnetic properties of melt-spun high entropy alloys (HEAs) Fe27Co27Ni27Si10−xB9Lax with various La substitutions for Si (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) were investigated in this work. The Fe27Co27Ni27Si10−xB9La0.6 alloy shows superior soft magnetic properties with low coercivity Hc of ~7.1 A/m and high saturation magnetization Bs of 1.07 T. The content of La has an important effect on the primary crystallization temperature (Tx1) and the secondary crystallization temperature (Tx2) of the alloys. After annealing at relatively low temperature, the saturation magnetization of the alloy increases and the microstructure with a small amount of body-centered cubic (BCC) phase embedded in amorphous matrix is observed. Increasing the annealing temperature reduces the magnetization due to the transformation of BCC phase into face-centered cubic (FCC) phase.

scholarly journals Preparation of ε-Fe(Si)3N Powder Using a Salt Bath Nitriding Reaction and a Study on the Soft Magnetic Properties of the Powder

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 228
Author(s):  
Yuhua Xu ◽  
Zhenghou Zhu ◽  
Hui Zhao ◽  
Jia Zhou
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Saturation Magnetization ◽  
Salt Bath ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Temperature Range ◽  
Nitriding Reaction ◽  
Salt Bath Nitriding ◽  
Fesi Alloy

In this paper, a single phase ε-Fe(Si)3N powder was successfully synthesized through the salt bath nitriding reaction method. The flaky FeSi alloy powder was used as the iron source, and non-toxic CO(NH2)2 was used as the nitrogen source. The nitridation mechanism, the preparation technology, the soft magnetic properties, and the magnetization temperature dependence of the powder were studied. The research result showed that ε-Fe(Si)3N alloy powders were synthesized in a high temperature nitrification system after the surface of flaky FeSi alloy powders were activated by a high-energy ball mill. The optimum nitriding process was nitridation for 1 h at 550 °C. The ε-Fe(Si)3N powder had good thermal stability at less than 478.8 °C. It was shown that ε-Fe(Si)3N powder has good soft magnetic properties, and the saturation magnetization of the powder was up to 139 emu/g. The saturation magnetization of ε-Fe(Si)3N powder remains basically constant in the temperature range of 300–400 K. In the temperature range of 400–600 K, the saturation magnetization decreases slightly with the increase of temperature, indicating that the magnetic ε-Fe(Si)3N powder has good magnetization temperature dependence.

Soft Magnetic Properties of Fe-Co/ZnO Multilayer Films

1990 ◽  
Vol 5 (5) ◽  
pp. 416-422
Author(s):  
T. Miyazaki ◽  
F. Sato ◽  
M. Takahashi ◽  
T. Tanaka ◽  
T. Shimazu
Keyword(s):  
Magnetic Properties ◽  
Multilayer Films ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

Soft magnetic properties of Fe/CoZr multilayer films

1992 ◽  
Vol 104-107 ◽  
pp. 1829-1830 ◽  
Author(s):  
M. Jimbo ◽  
E. Sobue ◽  
S. Tsunashima ◽  
S. Uchiyama
Keyword(s):  
Magnetic Properties ◽  
Multilayer Films ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

scholarly journals Soft magnetic properties of Fe-Co/ZnO multilayer films.

1989 ◽  
Vol 13 (2) ◽  
pp. 241-244 ◽  
Author(s):  
T. Miyazaki ◽  
F. Sato ◽  
M. Takahashi ◽  
T. Tanaka ◽  
T. Shimazu
Keyword(s):  
Magnetic Properties ◽  
Multilayer Films ◽  
Soft Magnetic Properties ◽  
Soft Magnetic
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