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1
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Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys

100%
Hasiak M.
Nukleonika
|
2015
|
vol. 60
|
issue 1
29-33
EN
The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti) materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd8Fe78B14 alloy leads to creation of an ineligible amount of the magnetically hard Nd2Fe14B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd8Fe79−xB13Mx (x = 4; M = Re or Ti) alloys are also analyzed.
2
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Hyperfine interaction and some thermomagnetic properties of amorphous and partially crystallized Fe70−xMxMo5Cr4Nb6B15(M = Co or Ni,x= 0 or 10) alloys

88%
Rzącki J., Świerczek J., Hasiak M., Olszewski J., Zbroszczyk J., Ciurzyńska W.
Nukleonika
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2015
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vol. 60
|
issue 1
121-126
EN
As revealed by Mössbauer spectroscopy, replacement of 10 at.% of iron in the amorphous Fe70Mo5Cr4Nb6B15 alloy by cobalt or nickel has no effect on the magnetic structure in the vicinity of room temperature, although the Curie point moves from 190 K towards ambient one. In the early stages of crystallization, the paramagnetic crystalline Cr12Fe36Mo10 phase appears before α-Fe or α-FeCo are formed, as is confirmed by X-ray diffractometry and transmission electron microscopy. Creation of the crystalline Cr12Fe36Mo10 phase is accompanied by the amorphous ferromagnetic phase formation at the expense of amorphous paramagnetic one.
3
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Magnetic cluster developement in In1−x MnxSb semiconductor alloys

88%
Rednic L., Deac I., Dorolti E., Coldea M., Rednic V., Neumann M.
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EN
X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and magnetic measurements as a function of applied magnetic field and temperature for In1−x MnxSb (0.05≤x≤0.2) system are reported. Magnetic measurements performed at high and small magnetic field in ZFC and FC indicate the coexistence of ferromagnetic In1−x MnxSb solid solution and two types of magnetic cluster: ferromagnetic MnSb and ferrimagnetic Mn2Sb. XPS valence band and Mn 2p core level spectra have confirmed the presence of MnSb and Mn2Sb phases. TEM images show some manganese antimonide phase microinclusions with dimension between (30–40) nm.
4
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Investigations of Structural, Elastic, Electronic, Magnetic and Transport Properties of the Heusler Compounds Zr₂PdZ (Z = Al, Ga, and In): FP-LAPW Method

88%
Khelfaoui F., Boudali A., Bentayeb A., El Hachemi Omari L., Si Abderrahmane Y.
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EN
Structural, elastic, electronic, magnetic and thermoelectric properties of the Heusler compounds: Zr₂PdAl, Zr₂PdGa, and Zr₂PdIn are performed using generalized gradient approximation with exchange-correlation function of the Perdew-Burke-Ernzerhof. The elastic constants are calculated at P=0 GPa. From the obtained elastic parameters, it is inferred that these compounds, with the Hg₂TiCu-type structure, are elastically stable and ductile in nature. The calculated density of states, magnetic moments and band structure are also given. The band structures of these compounds reveal that all of them have almost half metallic character with the narrow indirect band gap in the minority spin channel that amounts to 0.36, 0.46, and 0.40 eV for Zr₂PdAl, Zr₂PdGa, and Zr₂PdIn, respectively. The total spin magnetic moments (M_{tot}) of the considered compounds are very close to integer value 3, which satisfies a Slater-Pauling type rule for localized magnetic moment systems M_{tot}=Z_{T}-18, where Z_{T}=21 is the number of valence electrons in the primitive cell. The thermoelectric properties of these materials are discussed on the basis of the Seebeck coefficients, electrical and thermal conductivity relative to relaxation time as a function of temperature, at the Fermi level, using the Boltzmann transport theory. After several browse in the literature, the obtained results are the first predictions of the physical properties for the inverse full-Heusler compounds Zr₂PdZ (Z = Al, Ga and In).
5
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Content available

Prediction and Optimization of Magnetic Properties of Laser Welded AISI 430 Stainless Steels

88%
Mostaan H., Rafiei M.
Archives of Metallurgy and Materials
|
2018
|
vol. 63
|
issue 4
6
Publication available in full text mode
Content available

Modification of the Structure and Properties of FeSiB Amorphous Ribbon by Interference Pulsed Laser Heating

75%
Czyż O., Kusiński J., Radziszewska A., Ostrowski R., Morgiel J., Kanak J., Kąc M.
Archives of Metallurgy and Materials
|
2018
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vol. 63
|
issue 4
7
Publication available in full text mode
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Effect of Zr and Nb on the Electrical and Magnetic Properties of the Fe-Zr-Nb-B-Cu Alloy

75%
Noh J., Park S., Hwang H., Lim K.
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issue 3
8
Content available remote

Magnetic and transport properties of monocrystallineFe 3 O 4

63%
Paul K.
Open Physics
|
2005
|
vol. 3
|
issue 1
115-126
EN
A monocrystal ofFe 3 O 4 is characterized by resistance, magnetoresistance and magnetic measurements in a temperature range from 4.2 K to 350 K and magnetic field-cycling from −9 T to 9 T. The resistance measurements revealed a metal-insulator Verwey transition (VT) atT v=123.76 K with activation energy E=92.5 meV at T >T v and temperature-substitute for the activation energy below the VT,T 0=E/k B≈3800 K within 70 K–110K. The magnetotransport results independently verified the VT at 123.70 K, with discontinuous change in the magnetic moment ΔM≈0.21 ΔM≈0.21μ B and resistance hysteresis, dependent on the magnetic field in a narrow temperature range of 0.4° around theT v. The magnetic characterization established self consistentlyT v as ≈123.67 K, the jump in the magnetization at the VT≈0.25μ B and confirmed, that the magnetocrystalline anisotropy is the main microscopic mechanism responsible for the magnetization of the monocrystal (88%) with additional natural and imposed defects contributing as 12%.
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