TY - JOUR
T1 - The forced magnetostrictions and magnetic properties of Ni2MnX (X = In, Sn) ferromagnetic heusler alloys
AU - Sakon, Takuo
AU - Yamazaki, Junya
AU - Komori, Takumi
AU - Kanomata, Takeshi
AU - Narumi, Yasuo
AU - Hagiwara, Masayuki
AU - Nojiri, Hiroyuki
AU - Adachi, Yoshiya
N1 - Funding Information:
This research received no external funding. The authors thank Mitsuo Okamoto and Fumihiko Morioka of Ryukoku University for helping to create the apparatus. The authors thank Koji Fukushima and Taishi Yasuda of Tohoku Gakuin University. This project is partly supported by the Ryukoku Extension Center (REC) at Ryukoku University. This research was also carried out at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, and at the Center for Advanced High Magnetic Field Science in Osaka University under the Visiting Researchers' Program of the Institute for Solid State Physics, the University of Tokyo.
Publisher Copyright:
© 2020 by the authors.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Experimental studies into the forced magnetostriction, magnetization, and temperature dependence of permeability in Ni2MnIn and Ni2MnSn ferromagnetic Heusler alloys were performed according to the spin fluctuation theory of itinerant ferromagnetism proposed by Takahashi. We investigated the magnetic field (H) dependence of magnetization (M) at the Curie temperature TC, and at T = 4.2 K, which concerns the ground state of the ferromagnetic state. The M-H result at TC was analyzed by means of the H versus M5 dependence. At 4.2 K, it was investigated by means of an Arrott plot (H/M vs. M2) according to Takahashi's theory. As for Ni2MnIn and Ni2MnSn, the spin fluctuation parameters in k-space (momentum space, TA) and that in energy space (frequency space, T0) obtained at TC and 4.2 K were almost the same. The average values obtained at TC and 4.2 K were TA = 342 K, T0 = 276 K for Ni2MnIn and TA = 447 K, T0 = 279 K for Ni2MnSn, respectively. The forced magnetostriction at TC was also investigated. The forced linear magnetostriction (L/L) and the forced volume magnetostriction (V/V) were proportional toM4, which followed Takahashi's theory. We compared the forced volume magnetostriction V/V and mechanical parameter, bulk modulus K. V/V is inversely proportional to K. We also discuss the spin polarization of Ni2MnIn and other magnetic Heusler alloys. The pC/pS of Ni2MnIn was 0.860. This is comparable with that of Co2MnGa, which is a famous half-metallic alloy.
AB - Experimental studies into the forced magnetostriction, magnetization, and temperature dependence of permeability in Ni2MnIn and Ni2MnSn ferromagnetic Heusler alloys were performed according to the spin fluctuation theory of itinerant ferromagnetism proposed by Takahashi. We investigated the magnetic field (H) dependence of magnetization (M) at the Curie temperature TC, and at T = 4.2 K, which concerns the ground state of the ferromagnetic state. The M-H result at TC was analyzed by means of the H versus M5 dependence. At 4.2 K, it was investigated by means of an Arrott plot (H/M vs. M2) according to Takahashi's theory. As for Ni2MnIn and Ni2MnSn, the spin fluctuation parameters in k-space (momentum space, TA) and that in energy space (frequency space, T0) obtained at TC and 4.2 K were almost the same. The average values obtained at TC and 4.2 K were TA = 342 K, T0 = 276 K for Ni2MnIn and TA = 447 K, T0 = 279 K for Ni2MnSn, respectively. The forced magnetostriction at TC was also investigated. The forced linear magnetostriction (L/L) and the forced volume magnetostriction (V/V) were proportional toM4, which followed Takahashi's theory. We compared the forced volume magnetostriction V/V and mechanical parameter, bulk modulus K. V/V is inversely proportional to K. We also discuss the spin polarization of Ni2MnIn and other magnetic Heusler alloys. The pC/pS of Ni2MnIn was 0.860. This is comparable with that of Co2MnGa, which is a famous half-metallic alloy.
KW - Ferromagnetic heusler alloy
KW - Itinerant ferromagnetism
KW - Magnetization
KW - Magnetostriction
KW - Spin polarization
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U2 - 10.3390/MA13092017
DO - 10.3390/MA13092017
M3 - Article
AN - SCOPUS:85085329850
SN - 1996-1944
VL - 13
JO - Materials
JF - Materials
IS - 9
M1 - 2017
ER -