The Experts below are selected from a list of 4548 Experts worldwide ranked by ideXlab platform
F Brouers - One of the best experts on this subject based on the ideXlab platform.
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field dependence of the anomalous Hall Effect Coefficient of granular alloys with giant magnetoresistance
Jetp Letters, 1997Co-Authors: A B Granovskii, Alan Kalitsov, F BrouersAbstract:It is shown theoretically that the anomalous Hall Effect (AHE) Coefficient R s of magnetic granular alloys exhibiting giant magnetoresistance (GMR) depends strongly and, in the general case, nonmonotonically on the magnetic field as a result of the Effect of the field on the character of the charge-carrier scattering and the AHE. The experimental data, presented by H. Sato, H. Hemmi, Y. Kobayashi et al., J. Appl. Phys. 76, 6919 (1994), on the field dependence R s (H) in Co-Ag granular alloys at low temperatures are explained. The presence of a maximum in the field dependence |R s (H)| in annealed Co-Ag alloys attests to the fact that skew scattering plays a dominant role in the formation of the AHE and that the main carriers of the AHE in these alloys are states whose spin polarization is directed oppositely to the magnetization. The presence of a minimum in this dependence for unannealed samples indicates nonuniformity of the granule size distribution.
A B Granovskii - One of the best experts on this subject based on the ideXlab platform.
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field dependence of the anomalous Hall Effect Coefficient of granular alloys with giant magnetoresistance
Jetp Letters, 1997Co-Authors: A B Granovskii, Alan Kalitsov, F BrouersAbstract:It is shown theoretically that the anomalous Hall Effect (AHE) Coefficient R s of magnetic granular alloys exhibiting giant magnetoresistance (GMR) depends strongly and, in the general case, nonmonotonically on the magnetic field as a result of the Effect of the field on the character of the charge-carrier scattering and the AHE. The experimental data, presented by H. Sato, H. Hemmi, Y. Kobayashi et al., J. Appl. Phys. 76, 6919 (1994), on the field dependence R s (H) in Co-Ag granular alloys at low temperatures are explained. The presence of a maximum in the field dependence |R s (H)| in annealed Co-Ag alloys attests to the fact that skew scattering plays a dominant role in the formation of the AHE and that the main carriers of the AHE in these alloys are states whose spin polarization is directed oppositely to the magnetization. The presence of a minimum in this dependence for unannealed samples indicates nonuniformity of the granule size distribution.
Alan Kalitsov - One of the best experts on this subject based on the ideXlab platform.
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field dependence of the anomalous Hall Effect Coefficient of granular alloys with giant magnetoresistance
Jetp Letters, 1997Co-Authors: A B Granovskii, Alan Kalitsov, F BrouersAbstract:It is shown theoretically that the anomalous Hall Effect (AHE) Coefficient R s of magnetic granular alloys exhibiting giant magnetoresistance (GMR) depends strongly and, in the general case, nonmonotonically on the magnetic field as a result of the Effect of the field on the character of the charge-carrier scattering and the AHE. The experimental data, presented by H. Sato, H. Hemmi, Y. Kobayashi et al., J. Appl. Phys. 76, 6919 (1994), on the field dependence R s (H) in Co-Ag granular alloys at low temperatures are explained. The presence of a maximum in the field dependence |R s (H)| in annealed Co-Ag alloys attests to the fact that skew scattering plays a dominant role in the formation of the AHE and that the main carriers of the AHE in these alloys are states whose spin polarization is directed oppositely to the magnetization. The presence of a minimum in this dependence for unannealed samples indicates nonuniformity of the granule size distribution.
A Zhukov - One of the best experts on this subject based on the ideXlab platform.
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phase transitions magnetotransport and magnetocaloric Effects in a new family of quaternary ni mn in z heusler alloys
Journal of Nanoscience and Nanotechnology, 2012Co-Authors: A P Kazakov, Valerii Prudnikov, A B Granovsky, N S Perov, Igor Dubenko, Arjun K Pathak, Tapas Samanta, Shane Stadler, Naushad Ali, A ZhukovAbstract:The magnetic, magnetotransport, and magnetocaloric properties near compound phase transitions in Ni50Mn35In14 Z( Z= In, Ge, Al), and Ni48Co2Mn35In15 Heusler alloys have been studied using VSM and SQUID magnetometers (at magnetic fields (H) up to 5 T), four-probe method (at H = 0.005- 1.5 T), and an adiabatic magnetocalorimeter (for H changes up toH = 1� 8 T), respectively. The martensitic transformation (MT) is accompanied by large magnetoresistance (up to 70%), a signif- icant change in resistivity (up to 200%), and a sign reversal of the ordinary Hall Effect Coefficient, all related to a strong change in the electronic spectrum at the MT. The field dependences of the Hall resistance are complex in the vicinity of the MT, indicating a change in the relative concen- trations of the austenite and martensite phases at strong fields. Negative and positive changes in adiabatic temperatures of about −2 K and +2 K have been observed in the vicinity of MT and Curie temperatures, respectively, forH = 1� 8T.
A P Kazakov - One of the best experts on this subject based on the ideXlab platform.
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phase transitions magnetotransport and magnetocaloric Effects in a new family of quaternary ni mn in z heusler alloys
Journal of Nanoscience and Nanotechnology, 2012Co-Authors: A P Kazakov, Valerii Prudnikov, A B Granovsky, N S Perov, Igor Dubenko, Arjun K Pathak, Tapas Samanta, Shane Stadler, Naushad Ali, A ZhukovAbstract:The magnetic, magnetotransport, and magnetocaloric properties near compound phase transitions in Ni50Mn35In14 Z( Z= In, Ge, Al), and Ni48Co2Mn35In15 Heusler alloys have been studied using VSM and SQUID magnetometers (at magnetic fields (H) up to 5 T), four-probe method (at H = 0.005- 1.5 T), and an adiabatic magnetocalorimeter (for H changes up toH = 1� 8 T), respectively. The martensitic transformation (MT) is accompanied by large magnetoresistance (up to 70%), a signif- icant change in resistivity (up to 200%), and a sign reversal of the ordinary Hall Effect Coefficient, all related to a strong change in the electronic spectrum at the MT. The field dependences of the Hall resistance are complex in the vicinity of the MT, indicating a change in the relative concen- trations of the austenite and martensite phases at strong fields. Negative and positive changes in adiabatic temperatures of about −2 K and +2 K have been observed in the vicinity of MT and Curie temperatures, respectively, forH = 1� 8T.
