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Information × Registration Number 0212U001027, 0111U007590 , R & D reports Title Magnetooptical, optical and transport properties of the halfmetallic ferromagnetic Heusler alloys as potential materials for novel electronics popup.stage_title Head Kudryavtsev Yuriy Vladimirovich, Registration Date 06-01-2012 Organization National Academy of Sciences of Ukraine Technical center popup.description2 The second stage of the project was devoted to the experimental and theoretical study of the effect of atomic disordering on the way "L21 ordered phase - amorphous phase" or "L21 ordered phase - multiphase crystalline state" on the magnetooptical, optical, transport and magnetiuc properties of ctoichiometric Cu2MnAl alloy. Based on the obtained results the effect of martensitic transformation on the optical and transport properties of Cu-MnAl alloy was also investigated. Additionally, the first attempts of fabrication and investigation of the Co2CrFeAl Heusler alloy films as potetial spin-injectors for spintronic devices, were also made. The crystallization of amorphous Cu2MnAl films causes the increase in alloy resistivity by about 40%, while alloy decomposition on Cu3Mn2Al, Al6Mn and/or Cu4Al phases increases the resistivity. It was also shown that atomic disorder leads to significant reduction of magnetization and magneto-optical response of alloy. Cu2MnAl alloy in amorphous state is Pauli paramagnet down to 5K. Transition from austenite to martensite phase in Cu0.717Mn0.049Al0.234 alloy is accopmpanied with increase in alloy resistivity and changes of the optical properties in the intraband absorption region/ It was shown that increase in alloy resistivity is caused by decrease in plasma and increase in relazation frequences of free charge carriers in martensitic state. According to the resuults of first principle calculations Co2Cr0.5Fe0.5Al alloy is ferromagnet with spin polarization degree at the Fermi level of 99.95%. The films of Co2Cr0.5Fe0.5Al have been fabricated by using flash-evaporation techique. They have rather big Curie temperature, hawever their composition is somewhat differs from bulk alloy. Product Description popup.authors Кудрявцев Юрій Володимирович Уваров Віктор Миколайович Шпак Анатолій Петрович popup.nrat_date 2020-04-02 Close