Search results

Sort By:

Limit search:

Temperature Dependent Magnetic and Structural Properties of Ni-Mn-Ga Heusler Alloy Glass-Coated Microwires

100%

Shevyrtalov S., Chichay K., Ershov P., Khovaylo V., Zhukov A., Zhukova V., Rodionova V.

Acta Physica Polonica A

2015

vol. 127

issue 2

603-605

We report on structural and magnetic properties of glass-coated microwires of Ni-Mn-Ga-based Heusler alloys. Structural characterization of the as-prepared microwires revealed that they have a cubic structure at room temperature. It is shown that magnetic properties of microwires can be tailored by heat treatment as well as by removing the glass coating. Specifically, annealing of the microwires has a marked influence of the Curie temperature T_{C} which increases significatly in the heat-treated samples. Release of internal stresses in the microwires by removing the glass coating causes magnetization and the Curie temperature to decrease. This allowed us to conclude that in the studied microwires the magnetostriction constant is positive and estimate the value of internal stresses as being roughly equal to 1.5 GPa.

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

84%

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.

Refine search results

2 Acta Physica Polonica A

2 2015

2 Khovaylo V.

1 Bataev D.

1 Buchelnikov V.

1 Chichay K.

1 Drobosyuk M.

1 Ershov P.

1 Karpenkov D.

1 Pellenen A.

1 Rodionova V.

1 Shevyrtalov S.

1 Skokov K.

1 Taskaev S.

1 Ulyanov M.

1 Zherebtsov D.

1 Zhukov A.

1 Zhukova V.

Search results

Temperature Dependent Magnetic and Structural Properties of Ni-Mn-Ga Heusler Alloy Glass-Coated Microwires

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