First Observation of Non-Resonant X-Ray Magnetic Diffraction for Multilayers

2016 ◽  
Vol 698 ◽  
pp. 3-7
Author(s):  
Hidefumi Shimoyama ◽  
Tokiko Osawa ◽  
Hiromi Watanabe ◽  
Kosuke Suzuki ◽  
Hiroshi Sakurai ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Hysteresis ◽  
Perpendicular Magnetic Anisotropy ◽  
Diffraction Method ◽  
Magnetic Multilayers ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
Magnetization Direction ◽  
X Ray ◽  
First Time

Co/Pd magnetic multilayers have been prepared by using a sputtering method. Lattice distances and magnetic hysteresis curves have been measured by X-ray diffraction (XRD) measurements and magnetization measurements using a vibrating sample magnetometer (VSM). The XRD measurements have shown that the samples with thinner Pd layers have shorter lattice distances, and the VSM measurements have shown that the samples of thinner Co and thicker Pd layers are closer to those of perpendicular magnetic anisotropy. We have applied the X-ray magnetic diffraction method to the Co/Pd multilayer for the first time and have succeeded in observing a change in the X-ray diffraction intensities by the reversal of the magnetization direction.

Single-Crystal Synthesis and Structure Refinement of Na0.44MnO2

2011 ◽  
Vol 170 ◽  
pp. 198-202 ◽  
Author(s):  
Junji Akimoto ◽  
Hiroshi Hayakawa ◽  
Norihito Kijima ◽  
Junji Awaka ◽  
Fuji Funabiki
Keyword(s):  
Single Crystal ◽  
Structure Refinement ◽  
Bond Distance ◽  
Diffraction Method ◽  
X Ray Diffraction ◽  
Single Chain ◽  
X Ray ◽  
Crystal Synthesis ◽  
Manganese Valence ◽  
First Time

Single crystals of Na0.44MnO2 (=Na4Mn9O18) have been synthesized by a flux method at 1173 K for the first time. The crystal structure of Na0.44MnO2 has been refined by single-crystal X-ray diffraction method. The framework structure consists of double and triple rutile-type chains of edge-sharing MnO6 octahedra and a single chain of edge-sharing MnO5. The Mn-O bond distance and bond valence analyses revealed the manganese valence Mn3+/Mn4+ ordering in the Na0.44MnO2 structure.

Influence of Zinc-Zirconium Substitution on Magnetic Properties of Ba(ZnZr)xFe12-2xO19 Hexaferrite Prepared by the Molten Salt Method

2009 ◽  
Vol 79-82 ◽  
pp. 2071-2074 ◽  
Author(s):  
Hai Feng Li ◽  
Rong Zhou Gong ◽  
Xian Wang ◽  
Li Ren Fan ◽  
Gang He ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Molten Salt ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Chemical Compositions ◽  
Molten Salt Method ◽  
Vibrating Sample Magnetometer ◽  
Hexagonal Ferrites ◽  
X Ray Diffraction ◽  
X Ray

M-type hexaferrites Ba(ZnZr)xFe12-2xO19 (x=0, 0.5, 1.0, 1.5) powders, have been synthesized by molten salt method, where x varies from 0 to 1.5 in steps of 0.5. X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and vibrating sample magnetometer(VSM) were used to analyze the structures and magnetic properties. The results showed that, the magnetoplumbite structures for all samples calcining at 1100°C have been formed. The magnetic hysteresis loop measurements of the hexagonal ferrites powders showed that the saturation magnetization (Ms), the remanent magnetization (Mr), and the coercitivity (Hc) of ferrites depend strongly on the chemical compositions of materials. The data showed that the max Hc was obtained when substitution of x=1.0 (Hc=63.9 Oe), while the best Ms was obtained when substitution of x=0.5 (Ms=54.02 emu/g). Zn and Zr substitutions greatly modified the magnetic properties of BaM hexaferrite.

Hydrogenation and Magnetic Properties of Pd/Co Multilayers

1996 ◽  
Vol 458 ◽  
Author(s):  
A. Suzuki ◽  
K. Kyuno ◽  
E. Akiba ◽  
T. Manago ◽  
H. Miyajima ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Unit Volume ◽  
Unit Area ◽  
Perpendicular Magnetic Anisotropy ◽  
Anisotropy Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Crystalline ◽  
Xrd Patterns

ABSTRACTThe magnetic properties of sputtered Pd/Co multilaysers in hydrogen atmospheres were studied. The x-ray diffraction(XRD) patterns in hydrogen atmospheres showed that the lattice expansion of hydrogenated Pd decreased with decreasing thickness of Pd layers, which is reminiscent of nano-crystalline Pd. Perpendicular magnetic anisotropy(PMA) and saturation magnetization were reduced by the hydrogénation. The interface anisotropy energy per unit area, Ks, and volume anisotropy energy per unit volume, Kv are discussed. These results suggest that interface magnetic anisotropy between Pd and Co layers is suppressed by hydrogenation.

Structural and Magnetic Properties of CoFe2O4 / Si (001) Thin Films via Sol-Gel Method

2013 ◽  
Vol 744 ◽  
pp. 315-318
Author(s):  
Wei Rao ◽  
Ding Guo Li ◽  
Hong Chun Yan
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Exchange Coupling ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Magnetic Hysteresis ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Calcined Temperature

Cobalt ferrite (CoFe2O4) thin films have been prepared on Si (001) substrates, with different calcined temperatures (Tcal=400°C~800°C). The films structure was studied by X-ray diffraction (XRD) and their surface was examined by scanning electron microscopy (SEM). The magnetic properties were measured with a vibrating sample magnetometer (VSM). For low calcined temperatures, the films presented a mixture of a CoFe2O4phase, with the cubic spinel structure, and cobalt and iron antiferromagnet oxides with CoO and FeO stoichiometries. As the calcined temperature increased, the CoO and FeO relative content strongly decreased, so that for Tcal=800°Cthe films were composed mainly by polycrystalline CoFe2O4. The magnetic hysteresis cycles measured in the films were horizontally shifted due to an exchange coupling field originated by the presence of the antiferromagnetic phases.

Comparative Study on Mn-Zn Ferrites by One-Step Synthesis and Conventional Two-Step Synthesis

2010 ◽  
Vol 177 ◽  
pp. 260-263 ◽  
Author(s):  
Qing Kai Xing ◽  
Zhi Jian Peng ◽  
Xiu Li Fu ◽  
Zhi Qiang Fu ◽  
Cheng Biao Wang ◽  
...  
Keyword(s):  
Magnetic Hysteresis ◽  
Initial Permeability ◽  
Synthesis Methods ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnetic Performance ◽  
One Step ◽  
The Difference ◽  
The One

Mn-Zn ferrites doped with Cr3+ were prepared by “one-step synthesis” and conventional two-step synthesis methods, respectively. Their phase compositions and microstructures were characterized by X-ray diffraction and scanning electron microscopy, respectively. And their magnetic magnetic performance, such as saturation magnetization (Ms), magnetic hysteresis, initial permeability μi and power loss were comparatively investigated by vibrating sample magnetometer. It was observed that the difference of magnetic performance of the samples prepared by both methods is little. The similar performance of both methods makes the “one-step synthesis” especially attractive for application when considering energy economization.

Magnetic Anisotropy in Single Crystal Terfenol-D Thin Films

1997 ◽  
Vol 475 ◽  
Author(s):  
V. Oderno ◽  
C. Dufour ◽  
K. Dumesnil ◽  
A. Mougin ◽  
Ph. Bauer ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Growth Direction ◽  
X Ray Diffraction ◽  
Bulk Alloy ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Kerr Rotation ◽  
X Ray ◽  
First Time

ABSTRACTTb03.Dy0.7Fe2 (known as Terfenol-D) thin films have been epitaxially grown for the first time with [110] as the growth direction. X-Ray diffraction measurements evidence that the films are strained compared to the bulk alloy. Mössbauer spectroscopy and Kerr rotation measurements show that the easy magnetization direction varies from <116> at 4.2 K to around <133> at 300 K. This variation is different from the bulk case (for which the magnetization is along <100> at 4.2 K and along <111> at room temperature). This effect can be qualitatively understood if we consider the influence of the strains induced by epitaxy on the various energy terms which govern the direction of magnetization.

Effects of Y2O3 insertion layer on anisotropic magnetoresistance of Ni81Fe19 films

2016 ◽  
Vol 30 (07) ◽  
pp. 1650072
Author(s):  
Shuyun Wang ◽  
Huaxue Huang ◽  
Yang Sun ◽  
Tiejun Gao ◽  
Yuan He
Keyword(s):  
Phase Composition ◽  
Magnetron Sputtering ◽  
Substrate Temperature ◽  
Magnetic Hysteresis ◽  
Anisotropic Magnetoresistance ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
20 Nm

A series of Ta(4 nm)/Y2O[Formula: see text]/Ni[Formula: see text]Fe[Formula: see text](20 nm)/Y2O[Formula: see text]/Ta(3 nm) films were prepared on glass substrates by magnetron sputtering under appropriate conditions. AMR value, phase composition and magnetic hysteresis hoop of Ni[Formula: see text]Fe[Formula: see text] films were measured and analyzed by four-point probe technology, X-ray diffraction (XRD) and vibrating sample magnetometer (VSM), respectively. Influence of Y2O3 which work as oxidation intercalation on AMR values of Ni[Formula: see text]Fe[Formula: see text] films was investigated. The experiment results show that, at the substrate temperature of 450[Formula: see text]C, the AMR value of the film with Y2O3 layer thickness of 2.5 nm can reach 4.61%, increasing by 71.3% compares with the film without Y2O3 layer.

High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S

2016 ◽  
Vol 18 (6) ◽  
pp. 4617-4626 ◽  
Author(s):  
S. I. Sadovnikov ◽  
A. I. Gusev ◽  
A. V. Chukin ◽  
A. A. Rempel
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Diffraction Method ◽  
Silver Sulfide ◽  
X Ray Diffraction ◽  
X Ray ◽  
First Time

An in situ study of thermal expansion of polymorphic phases of coarse-crystalline and nanocrystalline silver sulfide – monoclinic acanthite α-Ag2S and cubic argentite β-Ag2S – has been carried out for the first time using the high-temperature X-ray diffraction method.

Structural and Magnetic Properties of CoFe2O4 Thin Films via Sol-Gel Method

2014 ◽  
Vol 716-717 ◽  
pp. 159-162 ◽  
Author(s):  
Shao Hua Yang ◽  
Ding Guo Li ◽  
Hai Bin Yang ◽  
Hong Chun Yan
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Exchange Coupling ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Magnetic Hysteresis ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Calcined Temperature

Cobalt ferrite (CoFe2O4) thin films have been prepared on Si (001) substrates, with different calcined temperatures (Tcal=400°C~800°C). The films structure was studied by X-ray diffraction (XRD) and their surface was examined by scanning electron microscopy (SEM). The magnetic properties were measured with a vibrating sample magnetometer (VSM). For low calcined temperatures, the films presented a mixture of a CoFe2O4phase, with the cubic spinel structure, and cobalt and iron antiferromagnet oxides with CoO and FeO stoichiometries. As the calcined temperature increased, the CoO and FeO relative content strongly decreased, so that for Tcal=800°Cthe films were composed mainly by polycrystalline CoFe2O4. The magnetic hysteresis cycles measured in the films were horizontally shifted due to an exchange coupling field originated by the presence of the antiferromagnetic phases.

Preparation and Magnetostriction of Epoxy-Bonded Pr(Fe0.4Co0.6)1.93 Composites

2012 ◽  
Vol 476-478 ◽  
pp. 1370-1373
Author(s):  
X Liu ◽  
J.J Liu ◽  
R.R Lin ◽  
H.Y Yin ◽  
X.C Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
X Ray ◽  
Magnetoelastic Properties ◽  
Type Composite ◽  
Easy Magnetization Direction

The magnetostrictive Pr(Fe0.4Co0.6)1.93alloy with MgCu2-type structure, and its 0-3 and pseudo 1-3 type epoxy-bonded composites were fabricated by curing without and with a magnetic field. The structural, magnetic and magnetoelastic properties were investigated by means of x-ray diffraction, a vibrating sample magnetometer and a standard strain technique. The 0-3 type composite has a larger magnetostriction than the 1-3 composite has, which can be ascribed to the easy magnetization direction (EMD) not lying along direction.

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