Low Temperature Specific Heat of Itinerant Electron Ferromagnet Sc<sub>3</sub>In

Takeuchi, Jun; Masuda, Yoshika

doi:10.1143/jpsj.46.468

Cited by 73 publications

(40 citation statements)

References 8 publications

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“…This field dependence of TMR is comparable with that in the itinerant ferromagnet Sc 3 In ͑T C = 5.3 K͒. 27,28 For T Ͼ 100 K, the TMR is positive. These transport data differ from those in nonmagnetic Fe 1.98 V 1.02 Al, 7 where ͑T͒ exhibits a rounded maximum around room temperature and the magnetoresistance is negative.…”

Section: Magnetoresistance and Low-temperature Electrical Resistivitysupporting

confidence: 58%

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

et al. 2010

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Weak itinerant ferromagnetism in Sato, K.; Naka, T.; Taguchi, M.; Nakane, T.; Ishikawa, F.; Yamada, Y.; Takaesu, Y.; Nakama, T.; de Visser, A.; Matsushita, A. Published in:Physical Review B DOI:10.1103/PhysRevB.82.104408 Link to publicationCitation for published version (APA): Sato, K., Naka, T., Taguchi, M., Nakane, T., Ishikawa, F., Yamada, Y., ... Matsushita, A. (2010 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We report measurements of the magnetic, transport, and thermal properties of the Heusler-type compound Fe 2 VAl 0.95 . We show that while stoichiometric Fe 2 VAl is a nonmagnetic semimetal a 5% substitution on the Al site with the 3d elements Fe and V atoms leads to a ferromagnetic ground state with a Curie temperature T C =33Ϯ 3 K and a small ordered moment s = 0.12 B / Fe in Fe 2 VAl 0.95 . The reduced value of the ratio s / p = 0.08, where p = 1.4 B / Fe is the effective Curie-Weiss moment, together with the analysis of the magnetization data M͑H , T͒, show magnetism is of itinerant nature. The specific heat shows an unusual temperature variation at low temperatures with an enhanced Sommerfeld coefficient, ␥ =12 mJ K −2 mol −1 . The resistivity, ͑T͒, is metallic and follows a power law behavior = 0 + AT n with n Ϸ 1.5 below T C . With applying pressure, T C decreases with the rate of ͑1 / T C ͒͑dT C / dP͒ = −0.061 GPa −1 . We conclude substitution on the Al site with Fe and V atoms results in itinerant ferromagnetism with a low carrier density.

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Section: Magnetoresistance and Low-temperature Electrical Resistivitysupporting

confidence: 58%

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

et al. 2010

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“…From the figure we can see the general tendency of dC m : After showing the broad maximum, it monotonically decreases with increasing temperature. This behavior is in agreement with experiments on Sc 3 In [5]. Our result also gives the good quantitative comparison because maximum values of specific heat increase in Fig.…”

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confidence: 92%

Magnetic entropy and specific heat of weak itinerant electron ferromagnets

Takahashi¹,

Masutani²,

Nakano³

2004

Journal of Magnetism and Magnetic Materials

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“…Alternatively, Arrott isotherms M 2 vs. H/M [40] had previously been employed to determine T C in Sc 3 In. Existing reports give this value to be less than 7.5 K [25][26][27][28][29]. If the Arrott plot technique were used for Sc 3.1 In (Fig.…”

Section: Arrott and Arrott-noakes Analysismentioning

confidence: 97%

“…3(a)), it would appear that ferromagnetic order occurred close to 9.75 K. This implies that the Sc-In ratio used for the current study is closest to the optimal one [25], compared to all previous reports. However, the Arrott isotherms deviate strongly from linearity at high H values [26,28,29]. This is a compelling indication that the mean-field theory cannot accurately describe the weak ferromagnetism in Sc 3.1 In, in contrast with, for example, ZrZn 2 [7].…”

Section: Arrott and Arrott-noakes Analysismentioning

confidence: 99%

Non-Fermi Liquid Behavior Close to a Quantum Critical Point in a Ferromagnetic State without Local Moments

et al. 2015

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A quantum critical point (QCP) occurs upon chemical doping of the weak itinerant ferromagnet Sc3.1In. Remarkable for a system with no local moments, the QCP is accompanied by non-Fermi liquid (NFL) behavior, manifested in the logarithmic divergence of the specific heat both in the ferro-and the paramagnetic states. Sc3.1In displays critical scaling and NFL behavior in the ferromagnetic state, akin to what had been observed only in f -electron, local moment systems. With doping, critical scaling is observed close to the QCP, as the critical exponents δ, γ and β have weak composition dependence, with δ nearly twice, and β almost half of their respective mean-field values. The unusually large paramagnetic moment µP M ∼ 1.3µB/F.U. is nearly composition-independent. Evidence for strong spin fluctuations, accompanying the QCP at xc = 0.035±0.005, may be ascribed to the reduced dimensionality of Sc3.1In, associated with the nearly one-dimensional Sc-In chains.arXiv:1410.6850v1 [cond-mat.str-el]

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Low Temperature Specific Heat of Itinerant Electron Ferromagnet Sc₃In

Cited by 73 publications

References 8 publications

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

Magnetic entropy and specific heat of weak itinerant electron ferromagnets

Non-Fermi Liquid Behavior Close to a Quantum Critical Point in a Ferromagnetic State without Local Moments

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Low Temperature Specific Heat of Itinerant Electron Ferromagnet Sc3In

Cited by 73 publications

References 8 publications

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

Weak itinerant ferromagnetism in Heusler-typeFe2VAl0.95

Magnetic entropy and specific heat of weak itinerant electron ferromagnets

Non-Fermi Liquid Behavior Close to a Quantum Critical Point in a Ferromagnetic State without Local Moments

Contact Info

Product

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Low Temperature Specific Heat of Itinerant Electron Ferromagnet Sc₃In