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Magnetocrystalline Anisotropy of Tb_{1.1}(FeCo)_{11}Ti

100%

Ivanova T., Pankratov N., Pastushenkov Y., Skokov K.

Acta Physica Polonica A

2000

vol. 97

issue 5

847-850

The Tb_{1.1}Fe_{11-x}Co_{x}Ti (x = 0, 1, 2, 3, 4) compounds with the ThMn_{12}-type structure were studied by using the torque and magnetization measurements in order to investigate temperature and composition behavior of the magnetocrystalline anisotropy. The Tb_{1.1}(FeCo)_{11}Ti single crystals demonstrated spin reorientation transition from easy axis to easy plane with the decrease in temperature. The substitution of Co for Fe produces an enhancement of the Curie temperatures, decreases temperatures of spin reorientation transition and appearance of canted structure.

Probing 3d-4f Exchange Interactions by High-Field Magnetization Measurements

88%

Skourski Y., Kuz'min M., Skokov K., Müller K., Wosnitza J.

Acta Physica Polonica A

2009

vol. 115

issue 1

178-180

In a 4f-3d ferrimagnet the molecular field (a net value expressing the relevant exchange interactions) can be determined from high-field magnetization measurements. If the applied field is high enough, it breaks the ferrimagnetic ground state and drives the system towards ferromagnetic order via non-collinear intermediate phases. Magnetization curves of Er_2Fe_{17} singe crystal were measured along the [100] crystallographic direction in magnetic fields up to 50 T. An unfixed sample, free to rotate, was measured as well. The magnetization measured along the easy magnetization direction shows jumps at 37.5 and 44 T. The first jump was used for the determination of the molecular field (66.4 T). This agrees with the data for the unfixed sample where a kink in the magnetization at 33.5 T yields a molecular field of 65.7 T. The obtained values are in a good agreement with literature data.

Magnetocaloric Properties of Severe Plastic Deformed Gd_{100-x}Y_x Alloys

64%

Taskaev S., Skokov K., Karpenkov D., Khovaylo V., Buchelnikov V., Zherebtsov D., Ulyanov M., Bataev D., Drobosyuk M., Pellenen A.

Acta Physica Polonica A

2015

vol. 127

issue 2

641-643

In this work we report on the results of investigation of the magnetocaloric effect in Gd_{100-x}Y_x (x = 0, 5, 10, 15) cold rolled ribbons. It is shown that the magnetocaloric effect exists within a wide temperature interval 258-295 K and is comparable with magnetocaloric effect observed in bulk samples of pure gadolinium. The value of the magnetocaloric effect in the rolled samples is reduced as compared with the bulk samples and strongly depends on the degree of the plastic deformation. Heat treatment procedures can restore the values of the magnetocaloric effect in the cold rolled ribbons up to initial ones. Thus, cold rolling is proposed to be a promising technique for producing thin forms of magnetocaloric materials for heat exchangers of magnetic cooling devices, modifying microstructure of the materials and related magnetic properties.

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3 Acta Physica Polonica A

1 2015

1 2009

1 2000

3 Skokov K.

1 Bataev D.

1 Buchelnikov V.

1 Drobosyuk M.

1 Ivanova T.

1 Karpenkov D.

1 Khovaylo V.

1 Kuz'min M.

1 Müller K.

1 Pankratov N.

1 Pastushenkov Y.

1 Pellenen A.

1 Skourski Y.

1 Taskaev S.

1 Ulyanov M.

1 Wosnitza J.

1 Zherebtsov D.

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Magnetocrystalline Anisotropy of Tb_{1.1}(FeCo)_{11}Ti

Probing 3d-4f Exchange Interactions by High-Field Magnetization Measurements

Magnetocaloric Properties of Severe Plastic Deformed Gd_{100-x}Y_x Alloys