Magnetic Properties of RFe9Ti Single Crystals with ThMn12 Structure

2009 ◽  
Vol 152-153 ◽  
pp. 62-65 ◽  
Author(s):  
Konstantin Skokov ◽  
Yury G. Pastushenkov ◽  
E.M. Semenova ◽  
Juan Bartolomé
Keyword(s):  
Magnetic Properties ◽  
Comparative Analysis ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Single Crystals ◽  
Iron Content ◽  
Spin Reorientation ◽  
Magnetization Process ◽  
First Order ◽  
Transition Field

A comparative analysis of the magnetic properties of RFe11Ti and RFe9Ti single crystals (R=Ho,Er) with ThMn12 structure was carried out. It is shown that the decrease of iron content causes a 10% decrease in the saturation magnetization and a reduction by 10-15K in the Curie temperature. Besides, field induced spin reorientation appears at about 60 kOe in RFe9Ti, while in HoFe9Ti the First Order Magnetization Process transition field increases by 10 kOe with respect to the corresponding RFe11Ti compound.

Magnetic Properties of Mn Substituted Barium Hexaferrite Single Crystals

2016 ◽  
Vol 843 ◽  
pp. 155-160 ◽  
Author(s):  
D.A. Vinnik ◽  
I.A. Zakharchuk ◽  
Erkki Lähderanta
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Single Crystal ◽  
Saturation Magnetization ◽  
Single Crystals ◽  
Room Temperature ◽  
Barium Hexaferrite ◽  
Substituted Barium Hexaferrite ◽  
Fe Substitution

This paper presents magnetic properties of manganese substituted barium hexaferrite BaFe12-xMnxO19 single crystals. Crystals of BaFe12–xMnxO19 with x up to 1.5 and sizes up to 8 mm were observed. The influence of Fe substitution by Mn on the magnetic properties was investigated. For the BaFe10.5Mn1.5O19 single crystal samples saturation magnetization reduced from 72 to 63.5 emu/g at room temperature, and Curie temperature decreased from 455 to 380 °C.

Suppression of Ferromagnetism in EuxCa1-xB6

2012 ◽  
Vol 190 ◽  
pp. 97-100 ◽  
Author(s):  
V.V. Glushkov ◽  
A.V. Kuznetsov ◽  
I. Sannikov ◽  
A.V. Bogach ◽  
S.V. Demishev ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Curie Temperature ◽  
Single Crystals ◽  
Effective Magnetic Moment ◽  
Paramagnetic State ◽  
Low Field ◽  
Wide Range ◽  
Free Ion ◽  
The Eu

We report the magnetic properties of EuxCa1-xB6 single crystals (0.756x1) studied in the wide range of temperatures (1.8-300 K) and magnetic fields (up to 50 kOe). It was found that low field magnetic susceptibility χ (T) follows the Curie-Weiss law χ~(T-Θp)-1 at high temperatures for all the concentrations studied. The effective magnetic moment of the Eu2+ ion estimated from the data diminishes from the free ion value μeff7.93μB (μB - Bohr magneton) for x=1 to μeff7.3μB for x=0.756. A universal behavior of magnetic susceptibility χ~(T-Θ)-α (α=1.5) is detected close to the Curie temperature TC in the paramagnetic state at both metallic (x>xC~0.8) and dielectric (xC.

Effect of Ball Milling on Magnetic Properties of Nb Substituted R2Fe16Nb1 (R: Gd and Er) Alloys

2013 ◽  
Vol 1516 ◽  
pp. 227-231
Author(s):  
B. K. Rai ◽  
S. R. Mishra ◽  
S. Khanra ◽  
K. Ghosh
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Ball Milling ◽  
Grain Refinement ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Lattice Expansion ◽  
Energy Ball

AbstractIn this work, we report the effect of high energy ball milling (HEBM) on Nb doped R2Fe16Nb1 (R= Gd, Er) compounds. The focus of the work is to bring enhancement in magnetic properties of R2Fe17 (2:17) compounds with the ball milling. Specifically, we find that the ball milling increases saturation magnetization, coercivity, and Curie temperature. The increase in the magnetization and Curie temperature upon ball milling is related to the lattice expansion and microstrains while the increase in coercivity is related to the grain refinement.

High-field magnetization process and spin reorientation in (Nd1−xDyx)2Fe14B single crystals

1991 ◽  
Vol 44 (18) ◽  
pp. 10014-10020 ◽  
Author(s):  
D. W. Lim ◽  
H. Kato ◽  
M. Yamada ◽  
G. Kido ◽  
Y. Nakagawa
Keyword(s):  
Single Crystals ◽  
High Field ◽  
Spin Reorientation ◽  
Magnetization Process ◽  
Field Magnetization ◽  
High Field Magnetization

scholarly journals Одноионный механизм слабого антиферромагнетизма и спин-флоп-переход в двухподрешеточном ферромагнетике

2020 ◽  
Vol 62 (7) ◽  
pp. 1036
Author(s):  
С.Н. Мартынов
Keyword(s):  
Ground State ◽  
Spin Reorientation ◽  
Heisenberg Ferromagnet ◽  
Local Anisotropy ◽  
First Order ◽  
Ferromagnetic Crystal ◽  
Anisotropy Parameters ◽  
Transition Field ◽  
Magnetic States ◽  
Magnetization Field

The ground state of a Heisenberg ferromagnet with noncollinear single-ion anisotropy axes of two sublattices is investigated in the external magnetic field applied in the anisotropy axes plane. The noncollinearity of local anisotropy axes leads to new effect - the first order spin reorientation phase transition of the spin-flop type. The transition field depends on the value of anisotropy and orientation of the sublattice axes. Stability analysis of magnetic states shown that the field induced transition is accompanied by the magnetization hysteresis. The dependencies of the spin-flop transition field, the magnetization jump value and the susceptibility on the anisotropy parameters are determined. The obtained results are used for explanation of the magnetization field dependence in the ferromagnetic crystal PbMnBO_4.

Phase Stability and Magnetic Properties of E21-(Co, Ni)3AlC Based Alloys

2002 ◽  
Vol 753 ◽  
Author(s):  
Yoshisato Kimura ◽  
Kaoru Iida ◽  
Yoshinao Mishima
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Concentration Dependence ◽  
Phase Stability ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Quaternary System ◽  
Ternary Systems ◽  
Chemical Concentration

ABSTRACTPhase stability of E21 (Co, Ni)3AlC was investigated from the viewpoint of magnetic properties in the Co-Ni-Al-C quaternary system. Isotherms of the Co-Al-C and Ni-Al-C ternary systems at 1373 K were revised and evaluated by means of electron probe microanalysis. Magnetic properties measurement revealed that discontinuity appearing on the chemical concentration dependence of Curie temperature and saturation magnetization of E21 (Co,Ni)3AlC indicates the existence of two types of E21 phase in the Co-Ni-Al-C quaternary system.

scholarly journals Study of the magnetic properties of Zn doped Cobalt ferrite (CoZnxFe2-xO4)

2020 ◽  
Vol 10 (3) ◽  
pp. 5665-5669
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Cobalt Ferrite ◽  
Zinc Concentration ◽  
Initial Permeability ◽  
Maximum Value ◽  
Zn Content ◽  
Strain Derivative ◽  
Relative Quality

Zinc substitution is proposed as an efficient way to improve the performance of the ferrite. In this work, Zinc doped cobalt ferrite with the generic formula CoZnxFe2-xO4, with x = 0.0, 0.1, 0.3 and 0.4 were prepared by conventional ceramic technique, sintered at 1000ο C for 4 hours in air. The effect of zinc concentration on the initial permeability, Curie temperature, saturation magnetization, magnetic moment, coercivity and magnetic susceptibility was investigated. Contrary to most of the work in this subject, here Co is maintained fixed and Fe is progressively varied along with Zn. Curie temperature is found to increase initially up to 459 0C for Zn content of x = 0.1 and then decreased to 1480C for further increase of Zn content (x = 0.4). Effect of Zn on the frequency dependent initial permeability, loss factor and relative quality factor was studied. The maximum value of saturation magnetization (51.37emu/gm) was found for the sample x = 0.1 and then decreases with the increase of Zn content. Morphological and magnetic properties of the samples were studied using scanning electron microscope (SEM) and vibrating sample magnetometer (VSM) respectively. The Zn-doped cobalt-ferrite (x = 0.1) having a high strain derivative could be a potential material for stress sensor application.

Magnetocaloric Effect of RCo5 Single Crystals in the Region of Spin-Reorientation Transitions

2010 ◽  
Vol 168-169 ◽  
pp. 134-137 ◽  
Author(s):  
Y.S. Koshkid’ko ◽  
Konstantin Skokov ◽  
Yury G. Pastushenkov ◽  
S.A. Nikitin ◽  
T.I. Ivanova
Keyword(s):  
Experimental Data ◽  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Single Crystals ◽  
Spin Reorientation ◽  
Direct Measurements ◽  
Good Accordance

Direct measurements of the magnetocaloric effect (MCE) in RCo5 single crystals in the region of spin-reorientation transitions (SRT) were carried out. It was shown that the values of MCE in the region of SRTs are comparable to the values of MCE in the vicinity of the Curie temperature. The anisotropy constants of the compounds were measured by the torque method. The anisotropic MCE calculation on the basis of anisotropy constants showed a good accordance with the experimental data.

Magnetic Properties of the Gd1-xTbxNi3 Intermetallic Compounds

2011 ◽  
Vol 170 ◽  
pp. 109-113 ◽  
Author(s):  
Anna Bajorek ◽  
Grażyna Chełkowska ◽  
Artur Chrobak ◽  
Marzena Kwiecień-Grudziecka
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Intermetallic Compounds ◽  
Applied Magnetic Field ◽  
Magnetic Measurements ◽  
Zero Field ◽  
Zero Field Cooling ◽  
Field Cooling

The paper presents selected magnetic properties of the Gd1-xTbxNi3 intermetallic compounds. Based on the wide-ranging SQUID magnetometer (Quantum Design MPMS, temperature from 1.9K to 300K and magnetic field up to 7T) series of different magnetic measurements were carried out. In studied system the saturation magnetization and the Curie temperature strongly depends of Tb concentration. Moreover, the so-called field cooling - zero field cooling (FC-ZFC) curves reveal a dependence of M(T) on the applied magnetic field. The thermomagnetic curves indicate interesting behaviour which is typical for terbium compounds and can be ascribed to the interaction between different aligned magnetic subblattices.

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