Low spin reorientation transition temperature, high coercivity, Nd2(Fe,Co,Cr)1 4B based hard magnetic nanoparticles

V. Chaudhary; Y. Zhong; H. Parmar; X. Tan; R. V. Ramanujan

doi:10.1109/INTMAG.2018.8508544

Low spin reorientation transition temperature, high coercivity, Nd₂(Fe,Co,Cr)_{1 4}B based hard magnetic nanoparticles

V. Chaudhary, Y. Zhong, H. Parmar, X. Tan, R. V. Ramanujan

Nanyang Technological University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We have synthesized high coercivity Nd₂Fe₁ 0 ₅CO₂Cr_{L 5}B magnetic nanoparticles through a green and low cost mechanochemical method. The coercivity (H_C) of isolated Nd₂(Fe₁ 0 ₅CO₂Cr_L5)B nanoparticles and nanoparticles embedded in a CaO matrix was found to be 11.3 kOe and 9 kOe, respectively. The thermal coefficient of remanence (a (Mr)) and coercivity (ß (H¿)) of these nanoparticles after removal of CaO, measured from room temperature to 400 K, was found to be -0.0015 and -0.0065, respectively. These nanoparticles exhibit the spin reorientation transition temperature (T_{S R}) of ~ 89 K, which is ~46 K less than that of bulk Nd₂Fe_{1 4}B magnets, hence, more attractive for cryogenic applications.

Original language	English
Title of host publication	2018 IEEE International Magnetic Conference, INTERMAG 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538664254
DOIs	https://doi.org/10.1109/INTMAG.2018.8508544
Publication status	Published - Oct 24 2018
Externally published	Yes
Event	2018 IEEE International Magnetic Conference, INTERMAG 2018 - Singapore, Singapore Duration: Apr 23 2018 → Apr 27 2018

Publication series

Name	2018 IEEE International Magnetic Conference, INTERMAG 2018

Conference

Conference	2018 IEEE International Magnetic Conference, INTERMAG 2018
Country/Territory	Singapore
City	Singapore
Period	4/23/18 → 4/27/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Instrumentation

Access to Document

10.1109/INTMAG.2018.8508544

Cite this

Chaudhary, V., Zhong, Y., Parmar, H., Tan, X., & Ramanujan, R. V. (2018). Low spin reorientation transition temperature, high coercivity, Nd₂(Fe,Co,Cr)_{1 4}B based hard magnetic nanoparticles. In 2018 IEEE International Magnetic Conference, INTERMAG 2018 Article 8508544 (2018 IEEE International Magnetic Conference, INTERMAG 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2018.8508544

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abstract = "We have synthesized high coercivity Nd2Fe1 0 5CO2CrL 5B magnetic nanoparticles through a green and low cost mechanochemical method. The coercivity (HC) of isolated Nd2(Fe1 0 5CO2CrL5)B nanoparticles and nanoparticles embedded in a CaO matrix was found to be 11.3 kOe and 9 kOe, respectively. The thermal coefficient of remanence (a (Mr)) and coercivity ({\ss} (H¿)) of these nanoparticles after removal of CaO, measured from room temperature to 400 K, was found to be -0.0015 and -0.0065, respectively. These nanoparticles exhibit the spin reorientation transition temperature (TS R) of ~ 89 K, which is ~46 K less than that of bulk Nd2Fe1 4B magnets, hence, more attractive for cryogenic applications.",

author = "V. Chaudhary and Y. Zhong and H. Parmar and X. Tan and Ramanujan, {R. V.}",

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Chaudhary, V, Zhong, Y, Parmar, H, Tan, X & Ramanujan, RV 2018, Low spin reorientation transition temperature, high coercivity, Nd₂(Fe,Co,Cr)_{1 4}B based hard magnetic nanoparticles. in 2018 IEEE International Magnetic Conference, INTERMAG 2018., 8508544, 2018 IEEE International Magnetic Conference, INTERMAG 2018, Institute of Electrical and Electronics Engineers Inc., 2018 IEEE International Magnetic Conference, INTERMAG 2018, Singapore, Singapore, 4/23/18. https://doi.org/10.1109/INTMAG.2018.8508544

Low spin reorientation transition temperature, high coercivity, Nd₂(Fe,Co,Cr)_{1 4}B based hard magnetic nanoparticles. / Chaudhary, V.; Zhong, Y.; Parmar, H. et al.
2018 IEEE International Magnetic Conference, INTERMAG 2018. Institute of Electrical and Electronics Engineers Inc., 2018. 8508544 (2018 IEEE International Magnetic Conference, INTERMAG 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - We have synthesized high coercivity Nd2Fe1 0 5CO2CrL 5B magnetic nanoparticles through a green and low cost mechanochemical method. The coercivity (HC) of isolated Nd2(Fe1 0 5CO2CrL5)B nanoparticles and nanoparticles embedded in a CaO matrix was found to be 11.3 kOe and 9 kOe, respectively. The thermal coefficient of remanence (a (Mr)) and coercivity (ß (H¿)) of these nanoparticles after removal of CaO, measured from room temperature to 400 K, was found to be -0.0015 and -0.0065, respectively. These nanoparticles exhibit the spin reorientation transition temperature (TS R) of ~ 89 K, which is ~46 K less than that of bulk Nd2Fe1 4B magnets, hence, more attractive for cryogenic applications.

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Chaudhary V, Zhong Y, Parmar H, Tan X, Ramanujan RV. Low spin reorientation transition temperature, high coercivity, Nd₂(Fe,Co,Cr)_{1 4}B based hard magnetic nanoparticles. In 2018 IEEE International Magnetic Conference, INTERMAG 2018. Institute of Electrical and Electronics Engineers Inc. 2018. 8508544. (2018 IEEE International Magnetic Conference, INTERMAG 2018). doi: 10.1109/INTMAG.2018.8508544