Magnetic Field-Induced Strain of Ni–Co–Mn–In Alloy in Pulsed Magnetic Field

Sakon, Takuo; Yamazaki, Shingo; Kodama, Yasushi; Motokawa, M.; Kanomata, T.; Oikawa, Katsunari; Kainuma, Ryosuke; Ishida, K.

doi:10.1143/jjap.46.995

Cited by 35 publications

(18 citation statements)

References 15 publications

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“…However, as reported by Sakon et al, for NiCoMnIn alloy at about 300 K, the magnetic field hystereses under pulse fields do not differ observably compared with the previous results under steady fields. 11) While for the present NiCoMnAl alloy system, there is still no report of the comparisons up to now, similar to the reports by Sakon et al, the results under pulse magnetic fields may not deviate much from those under steady magnetic fields. Further investigations are still required to experimentally verify this point.…”

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confidence: 74%

Kinetic Arrest of Martensitic Transformation in NiCoMnAl Metamagnetic Shape Memory Alloy

Ito

Tokunaga

et al. 2010

Mater. Trans.

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Magnetic properties and martensitic transformation behaviors of NiCoMnAl metamagnetic shape memory alloys were investigated. The kinetic arrest phenomenon was observed at about 40 K during thermomagnetization measurements. At temperatures ranging from 4.2 to 200 K, magnetic field-induced reverse transformation was confirmed by a pulse magnetometer with a magnetic field up to 45 T. By plotting the equilibrium magnetic fields against the measured temperature, the transformation entropy change was calculated by using the ClausiusClapeyron equation. The transformation entropy change was found to become zero below 40 K, which can explain the appearance of the kinetic arrest phenomenon. An unusual type of ferromagnetic shape memory (SM) alloy has been recently found in Ni-Mn-X (X ¼ In, Sn, and Sb) Heusler alloys, 1) for which the parent phase shows much stronger magnetism than that of the martensite phase.2-5) As a result, during martensitic transformation a drastic change in magnetization can be observed in thermomagnetization measurement. In these alloys, the martensitic transformation temperatures drastically decrease with increasing magnetic field if the specimen is subjected to field cooling. Furthermore, a magnetic field-induced transformation, namely, metamagnetic phase transformation (MMPT), has also been reported in NiCoMnIn, 6) NiCoMnSn, 7)NiCoMnGa, 8) NiCoMnSb 9) and NiCoMnAl 10) alloys, and an almost perfect magnetic field-induced SM effect, that is, the metamagnetic SM effect, at room temperature has been confirmed in single crystalline Ni 45 Co 5 Mn 36:7 In 13:3 6,11) and polycrystalline Ni 43 Co 7 Mn 39 Sn 11 7) alloys. For NiCoMnAl alloys, it has also been reported that the grain boundaries have relatively high strength and that even polycrystalline samples can be subjected to compression and deformation. Additionally, due to its low cost, the potential for practical application has also been pointed out.Very recently, for

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confidence: 74%

Kinetic Arrest of Martensitic Transformation in NiCoMnAl Metamagnetic Shape Memory Alloy

Ito

Tokunaga

et al. 2010

Mater. Trans.

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“…Recently, Sakon et al [31] have reported that the same Ni 45 Co 5 Mn 36.7 In 13.3 single crystal shows an almost perfect MMSME for a single magnetic field pulse of 200 Hz, whose characteristic features are similar to those in static magnetic field. 3 alloy in which a compressive pre-strain of about 3 % was applied, where the magnetic field was applied vertically to the compressive axis of the specimen and the length change parallel to the compressive axis was measured.…”

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confidence: 92%

NiMn-Based Metamagnetic Shape Memory Alloys

Kainuma

Ito

et al. 2009

MSF

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Abstract. The magnetic properties of the parent and martensite phases of the Ni 2 Mn 1+x Sn 1-x and Ni 2 Mn 1+x In 1-x ternary alloys and the magnetic field-induced shape memory effect obtained in NiCoMnIn alloys are reviewed, and our recent work on powder metallurgy performed for NiCoMnSn alloys is also introduced. The concentration dependence of the total magnetic moment for the parent phase in the NiMnSn alloys is very different from that in the NiMnIn alloys, and the magnetic properties of the martensite phase with low magnetization in both NiMnSn and NiMnIn alloys has been confirmed by Mössbauer examination as being paramagnetic, but not antiferromagnetic. The ductility of NiCoMnSn alloys is drastically improved by powder metallurgy using the spark plasma sintering technique, and a certain degree of metamagnetic shape memory effect has been confirmed. IntroductionSince Ullakko et al. [1] first reported a magnetic field-induced strain (MFIS) in a ferromagnetic single crystal of Ni 2 MnGa in 1996, the research in this field has drastically progressed and a huge MFIS of over 9% [2] has recently been reported. The MFIS in the Ni 2 MnGa alloys, however, is not due to the shape memory effect (SME) accompanying martensitic transformation, but rather to rearrangement of martensite variants by twin boundary migration in the martensite (M) phase. This twin boundary migration induced by a magnetic field is caused by the large crystalline magnetic anisotropy energy of the M phase with low crystal symmetry. Details on the MFIS in the Ni 2 MnGa alloys have recently been reviewed by Marioni et al. [3]. Although a large output strain and a rapid response can be confirmed in the Ni 2 MnGa alloy, the output stress is principally less than 5 MPa [4]. Furthermore, significant brittleness of the Ni 2 MnGa single crystal is a serious problem preventing application of this material. On the other hand, some trials using phase transformation itself to obtain an MFIS have been reported [5][6][7]. In Ni 2 MnGa alloys, however, a huge magnetic field is required to obtain magnetic field-induced transformation because both the P and M phases show ferromagnetism and the saturated magnetization of the M phase is comparable to that of the P phase [8]. Up to now, many Ni-based magnetic shape memory alloys (MSMAs) with similar magnetic properties, such as NiMnAl [9,10], NiCoAl [11,12], NiCoGa [12,13], NiFeGa [14,15], etc., have been reported and the characteristic features of their magnetic and martensitic transformations have been clarified.Recently, we have found an unusual transformation from a ferromagnetic P to a weak magnetic M phase in the NiMnIn-and NiMnSn-based Heusler alloys [16], which shows behaviors completely different from the previous MSMAs. These new types of magnetic shape memory alloys show many interesting phenomena derived from the unique transformation, such as magnetic field-induced phase transition, the inverse magnetocaloric effect [17,18], the giant magnetoresistance effect [19,20], giant

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“…Large MFIS has been observed for Ni 45 Co 5 Mn 36.7 In 13.3 (In13.3). 16,17) After a compressive pre-strain of approximately 3% was applied to In13.3, a steady magnetic field was applied parallel to the compression axis of the sample. The MFIS was measured using the threeterminal capacitance method.…”

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confidence: 99%

Magnetic Field-Induced Transition in Co-Doped Ni41Co9Mn31.5Ga18.5 Heusler Alloy

et al. 2013

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Thermal strain, magnetostriction and magnetization measurements of Ni 41 Co 9 Mn 31.5 Ga 18.5 polycrystalline ferromagnetic shape memory alloy (FSMA) were performed across the martensitic transition temperature, T M , and the reverse martensitic transition temperature, T R , at atmospheric pressure. When cooling from the austenite phase, a steep decrease in thermal expansion due to the martensitic transition at T M was found. When heating from the martensitic phase, a steep increase in the thermal expansion due to the reverse martensitic transition at T R was observed. These transition temperatures decreased gradually with increasing magnetic field. The field dependence of the martensitic transition temperature, dT M /dB, is ¹4.2 K/T and that of the reverse martensitic transition temperature, dT R /dB, is ¹7.9 K/T. The metamagnetic transition appeared between 330 and 390 K. The results of thermal strain and magnetization measurements indicate that a magneto-structural transition occurred at T M . The region above T M or T R is the ferromagnetic austenite phase and that below T M or T R is the paramagnetic or weak ferromagnetic martensitic phase. At constant temperature, a magnetic field-induced strain was observed with a value of 1.0 © 10 ¹3 , which indicates that this alloy is sensitive to magnetic fields. Strong magneto-structural coupling was revealed by the magnetic properties and phase transitions.

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Magnetic Field-Induced Strain of Ni–Co–Mn–In Alloy in Pulsed Magnetic Field

Cited by 35 publications

References 15 publications

Kinetic Arrest of Martensitic Transformation in NiCoMnAl Metamagnetic Shape Memory Alloy

Kinetic Arrest of Martensitic Transformation in NiCoMnAl Metamagnetic Shape Memory Alloy

NiMn-Based Metamagnetic Shape Memory Alloys

Magnetic Field-Induced Transition in Co-Doped Ni<sub>41</sub>Co<sub>9</sub>Mn<sub>31.5</sub>Ga<sub>18.5</sub> Heusler Alloy

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