Magnetic Field-Induced Reverse Martensitic Transformation and Thermal Transformation Arrest Phenomenon of Ni41Co9Mn39Sb11 Alloy

Metals

Rie Y. Umetsu¹  Xiao Xu⁴  Wataru Ito²  Takumi Kihara³  Kohki Takahashi¹  Masashi Tokunaga³  Ryosuke Kainuma⁴ 

[1] Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan; E-Mail:;Department of Materials and Environmental Engineering, Sendai National College of Technology, 48 Nodayama, Medeshima-Shiote, Natori, Miyagi 981-1239, Japan; E-Mail:;Institute for Solid State Physics, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan; E-Mails:;Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6-02 Aoba, Aramaki-Aza, Aoba-ku, Sendai 980-8579, Japan; E-Mails:

关键词: Heusler alloy;    martensitic transformation;    magnetic field-induced transformation;    thermal transformation arrest behavior;    magnetic structure;    magnetic moment;   

DOI  :  10.3390/met4040609

来源: mdpi

【 摘 要 】

In order to investigate behavior of magnetic field-induced reverse martensitic transformation for Ni-Co-Mn-Sb, magnetization experiments up to a static magnetic field of 18 T and a pulsed magnetic field of 40 T were carried out. In the thermomagnetization curves for Ni₄₁Co₉Mn₃₉Sb₁₁ alloy, the equilibrium transformation temperature T₀ was observed to decrease with increasing applied magnetic field, μ₀H, at a rate of dT₀/dμ₀H = 4.6 K/T. The estimated value of entropy change evaluated from the Clausius-Clapeyron relation was about 14.1 J/(K·kg), which was in good agreement with the value obtained by differential scanning calorimetric measurements. For the isothermal magnetization curves, metamagnetic behavior associated with the magnetic field-induced martensitic transformation was observed. The equilibrium magnetic field, μ₀H₀ = (μ₀H_Af + μ₀H_Ms)/2, of the martensitic transformation tended to be saturated at lower temperature; that is, transformation arrest phenomenon was confirmed for the Ni-Co-Mn-Sb system, analogous with the Ni(Co)-Mn-Z (Z = In, Sn, Ga, Al) alloys. Temperature dependence of the magnetic field hysteresis, μ₀H_hys = μ₀H_Af − μ₀H_Ms, was analyzed based on the model for the plastic deformation introduced by the dislocations. The behavior can be explained by the model and the difference of the sweeping rate of the applied magnetic field was well reflected by the experimental results.

【 授权许可】

CC BY   
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