Magnetocaloric properties of low-cost fe and sn substituted mnnisi-based alloys exhibiting a magnetostructural transition near room temperature

K. Deepak; R. V. Ramanujan

doi:10.1109/TMAG.2018.2832090

Magnetocaloric properties of low-cost fe and sn substituted mnnisi-based alloys exhibiting a magnetostructural transition near room temperature

K. Deepak, R. V. Ramanujan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The magnetocaloric properties of rare-earth free Mn_0.45Fe_0.55NiSi_1-ySn_y (y=0.12, 0.14, 0.16, and 0.18) alloys were studied. The raw material cost is significantly lower than the counterpart alloys containing Ge or Ga. Sn substitution reduced the Curie temperature (T_c) from 343 K (for y=0.12) to 248 K (for y=0.18), offering a wide range of working temperatures near room temperature. The alloys exhibited a training effect. The first-order transition weakened as the Sn content increased from 0.12 to 0.18. Interestingly, magnetostructural transformation was observed near room temperature for y=0.14, with a maximum entropy change (Δ S_max) of 8.64 Jkg^-1K^-1 for a field change of 5 T. Hence, Mn_0.45Fe_0.55NiSi_1-ySn_y alloys are promising candidates for low cost, near room temperature, magnetocaloric applications.

Original language	English
Article number	8369408
Journal	IEEE Transactions on Magnetics
Volume	54
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2018.2832090
Publication status	Published - Nov 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 1965-2012 IEEE.

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Keywords

Magnetic phase transition
magnetocaloric effect (MCE)
structural transition

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10.1109/TMAG.2018.2832090

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title = "Magnetocaloric properties of low-cost fe and sn substituted mnnisi-based alloys exhibiting a magnetostructural transition near room temperature",

abstract = "The magnetocaloric properties of rare-earth free Mn0.45Fe0.55NiSi1-ySny (y=0.12, 0.14, 0.16, and 0.18) alloys were studied. The raw material cost is significantly lower than the counterpart alloys containing Ge or Ga. Sn substitution reduced the Curie temperature (Tc) from 343 K (for y=0.12) to 248 K (for y=0.18), offering a wide range of working temperatures near room temperature. The alloys exhibited a training effect. The first-order transition weakened as the Sn content increased from 0.12 to 0.18. Interestingly, magnetostructural transformation was observed near room temperature for y=0.14, with a maximum entropy change (Δ Smax) of 8.64 Jkg-1K-1 for a field change of 5 T. Hence, Mn0.45Fe0.55NiSi1-ySny alloys are promising candidates for low cost, near room temperature, magnetocaloric applications.",

keywords = "Magnetic phase transition, magnetocaloric effect (MCE), structural transition",

author = "K. Deepak and Ramanujan, {R. V.}",

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journal = "IEEE Transactions on Magnetics",

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AU - Deepak, K.

AU - Ramanujan, R. V.

PY - 2018/11

Y1 - 2018/11

N2 - The magnetocaloric properties of rare-earth free Mn0.45Fe0.55NiSi1-ySny (y=0.12, 0.14, 0.16, and 0.18) alloys were studied. The raw material cost is significantly lower than the counterpart alloys containing Ge or Ga. Sn substitution reduced the Curie temperature (Tc) from 343 K (for y=0.12) to 248 K (for y=0.18), offering a wide range of working temperatures near room temperature. The alloys exhibited a training effect. The first-order transition weakened as the Sn content increased from 0.12 to 0.18. Interestingly, magnetostructural transformation was observed near room temperature for y=0.14, with a maximum entropy change (Δ Smax) of 8.64 Jkg-1K-1 for a field change of 5 T. Hence, Mn0.45Fe0.55NiSi1-ySny alloys are promising candidates for low cost, near room temperature, magnetocaloric applications.

AB - The magnetocaloric properties of rare-earth free Mn0.45Fe0.55NiSi1-ySny (y=0.12, 0.14, 0.16, and 0.18) alloys were studied. The raw material cost is significantly lower than the counterpart alloys containing Ge or Ga. Sn substitution reduced the Curie temperature (Tc) from 343 K (for y=0.12) to 248 K (for y=0.18), offering a wide range of working temperatures near room temperature. The alloys exhibited a training effect. The first-order transition weakened as the Sn content increased from 0.12 to 0.18. Interestingly, magnetostructural transformation was observed near room temperature for y=0.14, with a maximum entropy change (Δ Smax) of 8.64 Jkg-1K-1 for a field change of 5 T. Hence, Mn0.45Fe0.55NiSi1-ySny alloys are promising candidates for low cost, near room temperature, magnetocaloric applications.

KW - Magnetic phase transition

KW - magnetocaloric effect (MCE)

KW - structural transition

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Magnetocaloric properties of low-cost fe and sn substituted mnnisi-based alloys exhibiting a magnetostructural transition near room temperature

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

Access to Document

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