Magnetic Properties of Fe/Ru and Fe/Ir Superlattices with Short Periodicity

1991 ◽  
Vol 232 ◽  
Author(s):  
M. Piecuch ◽  
S. Andrieu ◽  
J. F. Bobo ◽  
M. Maurer ◽  
M. F. Ravet ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Magnetic Moment ◽  
Single Crystalline ◽  
Iron Base ◽  
First Case ◽  
Short Periodicity

ABSTRACTWe present new results on the magnetic properties of constrained, iron base, good quality, single-crystalline superlattices, Fe/Ru and Fe/Ir. It is shown that in the first case there are two magnetically dead layers at the interface while in the second case there is probably none. The magnetic moment of Fe is, in both superlattices, about 1.7μb. The magnetic anisotropy are opposite, in plane for Fe/Ru, perpendicular for Fe/Ir.

Influence of Ru on the Magnetic Properties of Y2T17 (T = Co, Fe)

2012 ◽  
Vol 194 ◽  
pp. 50-53 ◽  
Author(s):  
Alexander V. Andreev ◽  
Denis I. Gorbunov ◽  
Evgeniya A. Tereshina ◽  
Josef Šebek ◽  
Eva Šantavá ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Anisotropy Constant ◽  
Hexagonal Structure ◽  
Metamagnetic Transition ◽  
Single Crystalline ◽  
Spontaneous Magnetic Moment

Influence of Ru substitution on magnetic properties of Y2Fe17and Y2Co17(hexagonal structure of the Th2Ni17-type) has been studied on single-crystalline samples. Whereas in the Y2Fe17-xRuxsystem ferromagnetism is transformed rapidly into antiferromagnetism with a field-induced metamagnetic transition, in Y2Co17-xRuxonly a monotonous decrease of spontaneous magnetic moment, Curie temperature and first anisotropy constant is observed.

scholarly journals Preparation and Magnetic Properties of CoFe2O4 Oriented Fiber Arrays by Electrospinning

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3860
Author(s):  
Chen Cheng ◽  
Jianfeng Dai ◽  
Zengpeng Li ◽  
Wei Feng
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Hysteresis Loop ◽  
Magnetic Materials ◽  
Magnetic Moment ◽  
Easy Axis ◽  
Great Influence ◽  
Hysteresis Loops ◽  
Strong Anisotropy ◽  
Fiber Arrays

The morphology of magnetic materials has a great influence on the properties, which is attributed to the magnetic anisotropy of the materials. Therefore, it is worth studying the fabrication of the aligned fiber and the change of its domain distribution. Nanoparticles and nanofibers were prepared by the hydrothermal and electrospinning methods, respectively. At the same time, the arranged nanofibers were collected by the drum collecting device. After the same annealing at 700 °C, it was found that the diameter of fibers collected by different collecting drums is similar. By studying the hysteresis loops of nanoarrays, it was found that they had strong anisotropy. The easy axis was parallel to the long axis, the Hc and Mr of the easy axis and the hard axis were 1330.5 Oe, 32.39 Am2/kg, and 857.2 Oe, 24.8 Am2/kg, respectively. Due to the anisotropy of the shape and the interaction between the particles, the Hc could not be enhanced. Therefore, the Ms and Hc of the nanoparticles were 80.23 Am2/kg and 979.3 Oe, respectively. The hysteresis loop and the change of magnetic moment during the demagnetization of the CoFe2O4 nanofiber array were simulated via micromagnetic software. The simulated Hc was 1480 Oe, which was similar to the experimental value.

Magnetic properties of Tb2(Fe,Si)17 single crystals

1999 ◽  
Vol 14 (7) ◽  
pp. 2697-2700 ◽  
Author(s):  
Y. X. Li ◽  
S. X. Gao ◽  
J. Du ◽  
C. C. Tang ◽  
C. Cai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Domain Wall ◽  
Curie Temperature ◽  
Single Crystals ◽  
Magnetic Moment ◽  
Single Crystalline ◽  
Domain Wall Pinning ◽  
Spontaneous Magnetic Moment

The magnetic properties of single-crystalline Tb2Fe17−xSix (x = 0, 1, 2, 3, and 3.3) have been investigated. The Si substitution constricted the lattices by 1.5% and caused the Th2Ni17 transfer to Th2Zn17. The Curie temperature increased from 413 to 526 K, and the spontaneous magnetic moment decreased from 82.6 to 46.4 emu/g with the increase of Si. The stronger anisotropy and coercivity were generated by Si occupying the Fe sublattices. A domain wall pinning-dominated mechanism was responsible for increasing the coercivity force from 0.01 T (x = 1) to about 0.36 T (x = 3.3) at 1.5 K.

Dynamics and magnetic properties of NO molecules encapsulated in open-cage fullerene derivatives evidenced by low temperature heat capacity

2021 ◽  
Author(s):  
Yoji Horii ◽  
Hal Suzuki ◽  
Yuji Miyazaki ◽  
Motohiro Nakano ◽  
Shota Hasegawa ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Fullerene Derivatives ◽  
Molecular Cages ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity

Heat capacity analyses revealed dynamics and magnetic anisotropy of NO molecules confined in molecular cages.

Ni thickness influence on magnetic properties (Co/Ni/Co/Pt) multilayers with perpendicular magnetic anisotropy

2017 ◽  
Vol 441 ◽  
pp. 585-589 ◽  
Author(s):  
R. Sbiaa ◽  
I.A. Al-Omari ◽  
M. Al Bahri ◽  
P.R. Kharel ◽  
M. Ranjbar ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy

Effect of Thickness on Mechanically Tunable Magnetic Anisotropy of FeGa Thin Films Deposited on Flexible Substrates

2015 ◽  
Vol 815 ◽  
pp. 227-232 ◽  
Author(s):  
Ying Yu ◽  
Shu Hong Xie ◽  
Qing Feng Zhan
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Effective Strain ◽  
Anisotropy Field ◽  
Saturation Field ◽  
Effective Anisotropy ◽  
Magnetostriction Constant ◽  
The Difference ◽  
Different Strains

A practical way to manipulate the magnetic anisotropy of magnetostrictive FeGa thin films grown on flexible polyethylene terephthalate (PET) substrates is introduced in this study. The effect of film thickness on magnetic properties and magnetostriction constant of polycrystalline FeGa thin films was investigated. The anisotropy field Hk of flexible FeGa films, i.e., the saturation field determined by fitting the hysteresis curves measured along the hard axis, was enhanced with increasing the tensile strain applied along the easy axis of the thin films, but this enhancement via strain became unconspicuous with increasing the thickness of FeGa films. In order to study the magnetic sensitivity of thin films responding to the external stress, we applied different strains on these films and measure the corresponding anisotropy field. Moreover, the effective magnetostriction constant of FeGa films was calculated from the changes of both anisotropy field and external strain based on the Villari effect. A Neel’s phenomenological model was developed to illustrate that the effective anisotropy field of FeGa thin films was contributed from both the constant volume term and the inverse thickness dependent surface term. Therefore, the magnetic properties for the volume and surface of FeGa thin films were different, which has been verified in this work by using vibrating sample magnetometer (VSM) and magneto-optic Kerr effect (MOKE) system. The anisotropy field contributed by the surface of FeGa film and obtained by MOKE is smaller than that contributed by the film volume and measured by VSM. We ascribed the difference in Hk to the relaxation of the effective strain applied on the films with increasing the thickness of films.

Magnetic properties of single-crystalline CePt0.75Pd0.25Sn

2004 ◽  
Vol 272-276 ◽  
pp. E117-E118
Author(s):  
B. Janoušová ◽  
V. Sechovský ◽  
A.H. Lacerda ◽  
T. Komatsubara
Keyword(s):  
Magnetic Properties ◽  
Single Crystalline

Perpendicular Magnetic Anisotropy in Pt/Co/AlO Trilayer Structures Depending on AlO Thickness and Fabrication Method

2014 ◽  
Vol 616 ◽  
pp. 247-251
Author(s):  
Tim Yang ◽  
Z.Q. Wang ◽  
Makoto Kohda ◽  
Takeshi Seki ◽  
Koki Takanashi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetron Sputtering ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Atomic Layer ◽  
Rf Magnetron Sputtering ◽  
Layer Deposition ◽  
Significant Damage ◽  
Arbitrary Thickness ◽  
High Kinetic Energy

We investigate the perpendicular magnetic anisotropy dependence on the AlO capping layer in Pt/Co/AlO films. AlO was deposited on Pt/Co films by RF magnetron sputtering and atomic layer deposition (ALD) with varying thickness. It is found that the prolonged deposition of thick AlO layers by RF magnetron sputtering causes significant damage to the Pt/Co underneath while AlO layers formed by ALD can be of arbitrary thickness with no damage to the magnetic properties of the films. The decline of the magnetic properties can be attributed to the method of AlO deposition for each process. In the RF magnetron sputtering, AlO atoms with high kinetic energy are ejected from a sputter target resulting in the degradation of Pt/Co films, while the process of deposition of AlO by ALD is governed by a series of chemically reactive condensations allowing for arbitrary deposition thickness of AlO.

Magnetic Properties and Structure of the Alloy Fe63.5Ni10Cu1Nb3Si13.5B9 with Induced Magnetic Anisotropy

2021 ◽  
Vol 122 (6) ◽  
pp. 533-539
Author(s):  
V. A. Lukshina ◽  
N. V. Dmitrieva ◽  
E. G. Volkova ◽  
D. A. Shishkin
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Induced Magnetic Anisotropy
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