Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Khovailo, V. V."'
Publikováno v:
Phys. Rev. B 70 (2004) 174413
A systematic study of magnetic properties of Ni2+xMn1-xGa (0 \le x \le 0.19) Heusler alloys undergoing structural martensite-austenite transformations while in ferromagnetic state has been performed. From measurements of spontaneous magnetization, Ms
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405134
Publikováno v:
Scripta Mater. 51 (2004), pp. 13-17
Ni57.5Mn17.5Ga25 shape memory alloy exhibits a complex transformation behavior, appearing after aging. Aging in the austenitic state resulted in an ordinary decrease of the martensitic transformation temperature. Contrary to this, aging in the marten
Externí odkaz:
http://arxiv.org/abs/cond-mat/0404698
Publikováno v:
J. Phys.: Condens. Matter 16 (2004), pp. 1951-1961
Magnetic, transport, and x-ray diffraction measurements of ferromagnetic shape memory alloy Ni$_{2.16}$Mn$_{0.84}$Ga revealed that this alloy undergoes an intermartensitic transition upon cooling, whereas no such a transition is observed upon subsequ
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403495
Autor:
Khovailo, V. V., Abe, T., Koledov, V. V., Matsumoto, M., Nakamura, H., Note, R., Ohtsuka, M., Shavrov, V. G., Takagi, T.
Publikováno v:
Materials Transactions 44 (2003), pp. 2509-2512
Differential scanning calorimetry (DSC) and magnetic measurements were performed to study the influence of ferromagnetic 3-d transition elements Fe and Co on structural and magnetic properties of ferromagnetic shape memory alloys Ni2MnGa. Addition of
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312639
Publikováno v:
Physics-Uspekhi 46 (2003), pp. 559-588
In ferromagnetic alloys with shape memory large reversible strains can be obtained by rearranging the martensitic domain structure by a magnetic field. Magnetization through displacement of domain walls is possible in the presence of high magnetocrys
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311433
Publikováno v:
J. Magn. Magn. Mater. 272-276 (2004) p. 2067
We have studied the influence of alloying with a fourth element on the temperature of ferromagnetic ordering $T_C$ in Ni-Mn-Ga Heusler alloys. It is found that $T_C$ increases or decreases, depending on the substitution. The increase of $T_C$ is obse
Externí odkaz:
http://arxiv.org/abs/cond-mat/0309271
Publikováno v:
J. Appl. Phys. 94 (2003) pp. 2491-2493
It is shown that ac resistometry can serve as an effective tool for the detection of phase transitions, such as spin reorientation or premartensitic phase transitions, which generally are not disclosed by dc resistivity measurement. Measurement of te
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307096
Autor:
Cherechukin, A. A., Khovailo, V. V., Koposov, R. V., Krasnoperov, E. P., Takagi, T., Tani, J.
Publikováno v:
J. Magn. Magn. Mater. 258-259 (2003), pp. 523-525
The temperature and magnetic field dependencies of Ni-Mn-Ga polycrystals deformation are investigated. Ingots were prepared by arc-melting in argon atmosphere and further annealing. A training procedure (cycling across the martensitic transition poin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304425
Autor:
Filippov, D. A., Khovailo, V. V., Koledov, V. V., Krasnoperov, E. P., Levitin, R. Z., Shavrov, V. G., Takagi, T.
Publikováno v:
J. Magn. Magn. Mater. 258-259 (2003), pp. 507-509
Magnetic properties of a polycrystalline alloy Ni$_{2.19}$Mn$_{0.81}$Ga, which undergoes a first-order magnetostructural phase transition from cubic paramagnetic to tetragonal ferromagnetic phase, are studied. Hysteretic behavior of isothermal magnet
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303187
Publikováno v:
J. Appl. Phys. 93 (2003), p. 8483
The entropy change $\Delta S$ between the high-temperature cubic phase and the low-temperature tetragonally-based martensitic phase of Ni$_{2+x}$Mn$_{1-x}$Ga ($x = 0 - 0.20$) alloys was studied. The experimental results obtained indicate that $\Delta
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302352