91 research outputs found
Magnetic Anisotropy And Magnetic Phase Transitions In Afe10mo2 (r=pr, Nd, Sm, Dy, Ho, Er, Tm)
No full textRFe10Mo2 (R=Pr, Sm, Nd, Dy, Ho, Er, Tm) intermetallics were investigated by studying the temperatureor field-induced spin-reorientation transitions (SRT's). The temperature dependence of the magnetic anisotropy field was determined by means of the singular point-detection technique for the polycrystalline samples of YFe10Mo2, NdFe10Mo2, DyFe10Mo2. and ErFe10Mo2. Main emphasis was given to the theoretical analysis of the magnetic anisotropy constants and the magnetic phase transitions. The temperature dependences of the rare-earth anisotropy constants were calculated using the single-ion model within linear theory. The applicability of the linear theory of the R anisotropy is discussed. It is shown that the accuracy of this theory increases considerably with increasing temperature. Fitting the experimental data, a set of the crystal field and exchange field parameters for the rare-earth R3+ ions was deduced. The observed SRT's and first-order magnetization processes (FOMP's) were explained and classified. FOMP-like transitions in PrFe10Mo2, HoFe10Mo2, and ErFe10Mo2, were identified. The temperature dependence of the FOMP fields was calculated for HoFe10Mo2 and ErFe10Mo2. The physical origin of a low-temperature anomaly in the magnetization process is discussed for SmFe10Mo2. The spin-reorientation transitions in ErFe10Mo2 and TmFe10Mo2 are determined to be of first order with a discontinuous jump of the magnetization. The SRT's detected in NdFe10Mo2 and DyFe10Mo2 are of second order. The calculated temperature dependences of the anisotropy fields for DyFe10Mo2 and NdFe10Mo2 are in good agreement with the experimental data over a wide temperature range. FOMP's are predicted at low temperatures for NdFe10Mo2, DyFe10Mo2, and TmFe10Mo2.551380388Kou, X.C., Grossinger, R., Wiesinger, G., Liu, J.P., De Boer, F.R., Kleinschroth, I., Kronmuller, H., (1995) Phys. Rev. B, 51, p. 8254Sinnecker, E.H.C.P., unpublishedErmolenko, A.S., Shcherbakova, Y.V., Ivanova, G.V., Belozerov, Y.V., (1990) Phys. Met. Metall., 70, p. 52Wang, Y.Z., (1993) J. Appl. Phys., 73, p. 6251Xu, X., Shaheen, S.A., (1993) J. Appl. Phys., 73, p. 6248Wang, Y.Z., (1994) J. Appl. Phys., 75, p. 6226Christides, C., Kostikas, A., Kou, X.C., Grossinger, R., Niarchos, D., (1993) J. Phys. C, 5, p. 8611Tucker, R., Xu, X., Shaheeen, S.A., (1994) J. Appl. Phys., 75, p. 6229Guslienko, K.Yu., Kou, X.C., Grossinger, R., (1995) J. Magn. Magn. Mater., 150, p. 383Xu, X., Shaheen, S.A., (1994) J. Appl. Phys., 76, p. 6754Stevens, K.W.H., (1952) Proc. Phys. Soc. London Ser. A, 65, p. 209Hu, B.-P., Li, H.-S., Coey, J.M.D., Gavigan, J.P., (1990) Phys. Rev. B, 41, p. 2221Kuz'min, M.D., Coey, J.M.D., (1994) Phys. Rev. B, 50, p. 12533Kuz'min, M.D., (1992) Phys. Rev. B, 46, p. 8219Tyablikov, S.V., (1965) Methods of Quantum Theory of Magnetism, , Nauka, MoscowAsti, G., Bolzoni, F., (1980) J. Magn. Magn. Mater., 20, p. 29Freeman, A.J., Desclaux, J.P., (1979) J. Magn. Magn. Mater., 12, p. 1
Stress dependence of magnetization processes: Reversals and relaxation in FexCo{85-x}_B15 amorphous ribbons
No full textMagnetic anisotropy and magnetic phase transitions in RFe(10)Mo(2) (R=Pr,Nd,Sm,Dy,Ho,Er,Tm)
No full textRFe(10)Mo(2) (R=Pr, Sm, Nd, Dy, Ho, Er, Tm) intermetallics were investigated by studying the temperature or field-induced spin-reorientation transitions (SRT's). The temperature dependence of the magnetic anisotropy field was determined by means of the singular point-detection technique for the polycrystalline samples of YFe10Mo2, NdFe10Mo2, DyFe10Mo2, and ErFe10Mo2. Main emphasis was given to the theoretical analysis of the magnetic anisotropy constants and the magnetic phase transitions. The temperature dependences of the rare-earth anisotropy constants were calculated using the single-ion model within linear theory. The applicability of the linear theory of the R anisotropy is discussed. It is shown that the accuracy of this theory increases considerably with increasing temperature. Fitting the experimental data, a set of the crystal field and exchange field parameters for the rare-earth R(3+) ions was deduced. The observed SRT's and first-order magnetization processes (FOMP's) were explained and classified. FOMP-like transitions in PrFe10Mo2, HoFe10Mo2, and ErFe10Mo2 were identified. The temperature dependence of the FOMP fields was calculated for HoFe(10)MO(2) and ErFe10Mo2. The physical origin of a low-temperature anomaly in the magnetization process is discussed for SmFe10Mo2. The spin-reorientation transitions:in ErFe10Mo2 and TmFe10Mo2 are determined to be of first order with a discontinuous jump of the magnetization. The SRT's detected in NdFe10Mo2 and DyFe10Mo2 are of second order. The calculated temperature dependences of the anisotropy fields for DyFe10Mo2 and NdFe10Mo2 are in good agreement with the experimental data over a wide temperature range. FOMP's are predicted at low temperatures for NdFe10Mo2, DyFe10Mo2, and TmFe10Mo2.55138038
Social Support and Concussion: Exploring the Experiences of Youth Facing Barriers
No full textThe purpose of the study was to explore the experiences of youth facing barriers to positive development who have sustained a concussion to develop a detailed and rich understanding about what constitutes meaningful social support during concussion recovery. The lead author, who is a former high-performance athlete with a history of multiple concussions, interviewed four participants within this population and explored their concussion experiences. Using interpretive phenomenological analysis, participants explained how they valued social support that helped them preserve their independence, allowed them to retain their identity following their injury and made them feel less isolated and alone. They also highlighted the importance of adult figures providing dependable support by prioritizing their health. These results may resonate with others who have sustained a concussion that experience similar life circumstances and can be used to help them articulate or indicate the kind of social support they desire to better facilitate recovery.M.Sc.2024-11-13 00:00:0
Pulsed field magnetometer for industrial use
No full textAn industrial pulsed field magnetometer was developed, focusing on industrial needs. The system is to be used for the complete characterizing of permanent magnets in a production-line situation. The purpose is to create a fast, reliable, and accurate magnetometer for quality control but also, in a later step, as a standard measurement method for magnets
Venus revisited : reflecting sights/sites of beauty and its embodiments
No full textIncludes bibliographical references (p. 82-86).In this project the idealised body of Venus represents an uncomfortable whole. She symbolises the richly divergent, contrasting, and often thematic concerns of female beauty that my, work has attempted to represent. She signifies arid originates the centuries of fluctuating meaning and contesting truths about women and the way in which they are represented that are at the centre of my research - in an image that resists resolution. As the title of the body of practical work implies, Venus Revisited points to a journey of return. It refers to a recurrence of ideas about the idealised female body informed by its origins in Greek myth. Venus still informs current Western visual culture - the female body remains 'the map on which we mark our meanings' (Mullins, 1985: 331)
Coercivity And Disaccommodation On Amorphous (fe1-xrx)80b20
No full textAmorphous ribbons of the composition (Fe1-xRx)80B20 (R = Y, Ce, Pr, Nd, Sm, Gd, Ho, Er, Tm, Lu) (0{precedes above single-line equals sign}x{precedes above single-line equals sign}0.08) were studied by means of disaccommodation measurements, pinning field and coercivity measurements. The after-effect scales roughly with the square of the magnetostriction constant. The concentration dependence of the pinning field can be correlated with that of the coercivity. © 1994.1331-3270272Idzikowski, Wrzeciono, (1988) Phys. Stat. Solidi (a), 108, p. 375Khan, (1990) J. Magn. Magn. Mater., 86, p. L143Tejada, Martinez, Labarta, Grössinger, Hernando, (1990) J. Appl. Phys., 67, p. 5984Polak, (1992) Thesis, , University of ViennaJ.P. Sinnecker, M. Knobel, J.F. Saenger and R. Sato Turtelli, Proc. EMMA'93 (Kosice)Narita, Yamasaki, Fukunaga, (1980) IEEE Trans. Magn., 16, p. 435Grössinger, Wezulek, Sassik, The influence of the magnetostriction on the coercivity of amorphous ribbons (1990) Journal of Magnetism and Magnetic Materials, 83, p. 351Sinnecker, Grössinger, Turtelli, Exel, Greifeneder, Kuβ, (1994) J. Magn. Magn. Mater., 133, p. 20. , (this volume)Rezende, Turtelli, Missel, (1987) IEEE Trans. Magn., 23, p. 212
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