scholarly journals Low-temperature magnetic properties and high-temperature diffusive behavior ofLiNiO2investigated by muon-spin spectroscopy

2010 ◽  
Vol 82 (22) ◽  
Author(s):  
Jun Sugiyama ◽  
Yutaka Ikedo ◽  
Kazuhiko Mukai ◽  
Hiroshi Nozaki ◽  
Martin Månsson ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Muon Spin ◽  
Diffusive Behavior ◽  
Muon Spin Spectroscopy

scholarly journals Effect of Holding Time of Decarbonization Annealing on Recrystallization in Fe-3.2%Si-0.047Nb% Low-Temperature Oriented Silicon Steel

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1209
Author(s):  
Xin Tian ◽  
Shuang Kuang ◽  
Jie Li ◽  
Shuai Liu ◽  
Yunli Feng
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Grain Boundaries ◽  
Annealing Time ◽  
High Energy ◽  
Primary Recrystallization ◽  
Silicon Steel ◽  
Annealing Condition ◽  
Goss Texture

In this study, the effects of decarburization annealing time on the primary recrystallization microstructure, the texture and the magnetic properties of the final product of 0.047% Nb low-temperature grain-oriented silicon steel were investigated by means of OM, EBSD and XRD. The results show that when the decarburization annealing condition is 850 °C for 5 min, the uniform fine primary recrystallization microstructure can be obtained, and the content of favorable texture {111} < 112 > is the highest while that of unfavorable texture {110} < 112 > is the lowest, which is mostly distributed near the central layer. At the same time, there are the most high-energy grain boundaries with high mobility in the primary recrystallization microstructure of the sample annealed at 850 °C for 5 min, and the ∑9 boundary has the highest percentage of grain boundaries. The samples with different decarburization annealing time were annealed at high temperature. It was found that perfect secondary recrystallization occurred after high-temperature annealing when the decarburization annealing condition was 850 °C for 5 min. The texture component was characterized by a single Goss texture, and the size of the Goss grain reached 4.6mm. Under such annealing conditions, the sample obtained shows the optimal soft magnetic properties of B800 = 1.89T and P1.7/50 = 1.33 w/kg.

scholarly journals Magnetic Properties of Austenitic Stainless Steel 316l and 316lvm after High Temperature Gas Nitriding Treatment

ROTASI ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 72
Author(s):  
Agus Suprihanto
Keyword(s):  
Stainless Steel ◽  
Magnetic Properties ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Low Temperature ◽  
Stainless Steel 316L ◽  
Gas Nitriding ◽  
Good Corrosion Resistance ◽  
High Temperature Gas

Biometallic materials for implant devices not only have to good corrosion resistance but also stable nonmagnetic properties. Various method have been developed for enhanced the corrosion resistance i.e low temperature gas nitriding treatments. Unfortunatelly, low temperature gas nitriding produce weakly ferromagnetic due the presence of expanded austenitic phases. Another treatments methods which is capable for improvement the mechanical properties is high temperature gas nitriding. However, the evaluation of magnetic properties of austenitic stainless steel 316L and 316LVM not yet investigation. The evaluation of magnetic properties of austenitis stainless steel 316L and 316LVM after high temperature gas nitriding treatments have been succesfully done. The magnetic properties are evaluated by vibrating sample magnetometre (VSM) test. The magnetic properties such as magnetic remenance, magnetic saturation and magnetic permeability are improved. As treated 316L and 316LVM have more stable non-magnetic properties and they more safe and compatible for MRI test

Magnetic Properties of Rare-Earth/Fe Multilayered Films with Artificial Superstructures

1989 ◽  
Vol 151 ◽  
Author(s):  
Teruya Shinjo ◽  
Ko Mibu ◽  
Shinichi Ogawa ◽  
Nobuyoshi Hosoito
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
High Temperature ◽  
Low Temperature ◽  
Magnetic Measurements ◽  
Perpendicular Anisotropy ◽  
Deposition Technique ◽  
Multilayered Films ◽  
Mossbauer Spectra ◽  
Curie Temperatures

ABSTRACTBy using UHV deposition technique, multilayered films consisting of Fe and rare-earth (Dy, Nd or Y) layers were prepared. Magnetic properties of Fe layers were investigated from 57Fe Mössbauer spectroscopy. From SQUID magnetic measurements, the behavior of rare-earth layers was studied. In Fe/Dy and Fe/Nd multilayers, there often exists a large perpendicular anisotropy. Mössbauer spectra evidenced that, in certain samples, the magnetization changes the direction, from in-plane at high temperature to perpendicular at low temperature. The origin of the perpendicular anisotropy is attributed to interface rare-earth atoms which are magnetically coupled with ferromagnetic Fe layers even at higher than their bulk Curie temperatures.

scholarly journals Magnetic properties of Tm2Fe16 under pressure

2018 ◽  
Vol 185 ◽  
pp. 04018
Author(s):  
Anatoly Kuchin ◽  
Zdenek Arnold ◽  
Jiri Kamarád ◽  
Sergey Platonov
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Magnetic Moments ◽  
External Pressure ◽  
Complete Suppression ◽  
Moderate Pressure ◽  
Volume Changes ◽  
Uniaxial Magnetic Anisotropy ◽  
Magnetic States

The magnetic properties of the non-stoichiometric Tm2Fe16 compound under hydrostatic pressures up to 1 GPa were studied. We have revealed that the high-temperature ferrimagnetic state easily magnetized in the basal plane is very sensitive to the volume changes and even moderate pressure is sufficient to its complete suppression and transformation to a helimagnetic state. At the same time, the low-temperature ferrimagnetic state easily magnetized along the hexagonal axis does not disappear under pressure and the temperature of its transition to the high-temperature magnetic states increases under pressure. The remarkable stability of the ground ferrimagnetic state under external pressure can be attributed to the strengthening of the uniaxial magnetic anisotropy and to the mutual perpendicular orientation of the magnetic moments in the ground and the high-temperature magnetic states.

scholarly journals A Review of the Low Temperature Properties of the Rare Earth Vanadates

1998 ◽  
Vol 51 (2) ◽  
pp. 201 ◽  
Author(s):  
G. J. Bowden
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
High Temperature ◽  
Low Temperature ◽  
Intermediate State ◽  
Magnetic Structures ◽  
New Methods ◽  
Jahn Teller ◽  
Physical Effects ◽  
The Rare Earth

The rare earth vanadates have long been studied for their interesting magnetic properties and cooperative Jahn–Teller distortions. In the main, most of this work has been carried out at temperatures down to 1 K or so (e.g. Gehring and Gehring 1975). In this review NMRON, and other low temperature experiments in the mK regime, are presented and discussed. It will be argued that the low temperature properties of these compounds are just as interesting as their high temperature counterparts. In general, the nuclear and electronic wavefunctions become intermixed, leading to a variety of interesting physical effects, such as enhanced nuclear magnetism, quadrupolar induced intermediate state re-orientation etc. These effects have, in turn, spawned new methods for the investigation of magnetic structures, and thermometric detection of NMR both by internal and external thermometers. Several experiments are suggested, including magnetic refrigeration, Mössbauer, EPR in the ≈30 GHz range, in addition to thermometric NMR and NMRON.

Study, Magnetic Properties of BaTiFeO3 Perovskite Prepared by Solid State Method

2019 ◽  
Vol 891 ◽  
pp. 230-235 ◽  
Author(s):  
Vanussanun Aitviriyaphan ◽  
Thanapong Sareein ◽  
Sudarath Suntaropas ◽  
Panakamon Thonglor ◽  
Sangwoei Sawekwiharee ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Solid State ◽  
Low Temperature ◽  
Room Temperature ◽  
Solid State Reaction Method ◽  
Solid State Method ◽  
Reaction Method ◽  
Strength Material ◽  
State Method

The magnetic properties of BaFeTiO3 (BTFO) perovskite are investigated. BTFO samples were prepared by solid state reaction method through compression. Magnetic properties are influenced by electron environments of the Fe3+ ions within the perovskite structure. Furthermore, the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered at 800 oC for sintering as 800 oC for 6 hours at 1.898 emu/g, which is magnetization strength material more than sintering at 4 hours, 8 hours, 10 hours as 1.794 emu/g, 1.333 emu/g and 1.192 emu/g at measured of low temperature. Using the Curie-Weiss law fitting for investigate μeff~38μB high spin of Fe, negative of θ present to antiferromagnetic characteristics of BTFO sample. Finally, BTFO sintering at the high temperature of 800 oC for 6 hours exhibited the high Ms~1.898 emu/g at 50 K and ~1.216emu/g at room temperature.

Heat-Treatment Temperature Influence on Structure and Magnetic Properties of SrFe11.85Sm0.15O19 Ferrite Nanofiber

2013 ◽  
Vol 575-576 ◽  
pp. 313-316
Author(s):  
Xian Feng Meng ◽  
Yin Bo Hong ◽  
Yong Kang Ji
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
High Temperature ◽  
Low Temperature ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Temperature Influence ◽  
One Dimensional ◽  
Structure And Morphology ◽  
Calcined Temperature

one-dimensional SrFe11.85Sm0.15O19nanofibers were synthesized by electrospinning combined with heating treatments. This paper involved an investigation of how heat treatment temperature and Sm3+influence structure and morphology of nanofibers. FTIR and XRD results demonstrated that SrFe11.85Sm0.15O19magnetoplumbite phase was formed with increasing of calcined temperature, and small amountα-Fe2O3and SmFeO3were detected at low temperature and high temperature, respectively. The calcined temperature had a great impact on the morphology of nanofibers, which changes from a continuous fibrous structure to large plate grain. The VSM results revealed that the Ms and Hc of nanofiber were both increased with calcined temperature.

Synthesis of α-Fe2O3 Nanowires and its Magnetic Properties

2005 ◽  
Vol 23 ◽  
pp. 243-246 ◽  
Author(s):  
Y.W. Liu ◽  
X.F. Rui ◽  
Y.Y. Fu ◽  
Han Zhang
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
High Temperature ◽  
Low Temperature ◽  
Single Crystals ◽  
Magnetic Moment ◽  
Ferromagnetic Behavior ◽  
Fe2o3 Nanoparticle ◽  
Block Temperature ◽  
Antiferromagnetic Behavior

a-Fe2O3 nanowire was successfully synthesized by oxidation of pure iron. The as-synthesized a-Fe2O3 nanowire arrayed normal to the surface of the substrate, were perfect single crystals with diameters of 20 to 40 nm and lengths varying from 2 to 5 µm. The magnetic property of the nanowires was studied, and some interesting phenomena were observed. The magnetic moment of the nanowire shows an antiferromagnetic behavior at high temperature and a weakly ferromagnetic behavior at low temperature. The block temperature of the a-Fe2O3 nanowire was found to be significantly higher than that of a-Fe2O3 nanoparticle.

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

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