Magnetic Properties of the Nanocrystalline Nd-Ho-Fe-Co-B Alloy at Low Temperatures: The Influence of Time and Annealing / Tereshina I. S.,Kudrevatykh N. V.,Ivanov L. A.,Politova G. A.,Tereshina E. A.,Gorbunov D.,Doerr M.,Rogacki K. // JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE. - 2017. - V. 26, l. 10. - P. 4676-4680.

ISSN/EISSN:

1059-9495 / 1544-1024

Type:

Article

Abstract:

A study is made of the effects of various factors such as time (7 years), temperature, high magnetic field up to 580 kOe and heat treatment (HT) on the morphological structure and magnetic hysteresis properties of a high-coercive nanocrystalline (Nd0.55Ho0.45)(2.7)(Fe0.8Co0.2)(14)B-1.2 alloy with a low temperature coefficient of remanence. We find a rather weak time effect on (Nd0.55Ho0.45)(2.7)(Fe0.8Co0.2)(14)B-1.2. After 7 years, the loss in the maximum magnetic energy product (BH)(max) is no more than 5\%. Annealing of the sample at 250 A degrees C for 30 min decreases the amount of amorphous phase from 7.2 to 1.7\%, while the grains' size of the 2-14-1 phase increases from 83 to 109 nm. For the HT alloy, a magnetization jump is observed at H similar to 500 kOe. It can be attributed to the first-order magnetization process or a spin-flip magnetic transition. Rectangularity of the hysteresis loop degrades after annealing. In case of the short-time heat treatment, losses in (BH)(max) are similar to 10\%.

Author keywords:

hard magnetic materials; heat treatment; high magnetic field; hysteresis; stable magnetic characteristics SEVERE PLASTIC-DEFORMATION; HYSTERESIS PROPERTIES; MICROSTRUCTURE

DOI:

10.1007/s11665-017-2952-8

Web of Science ID:

ISI:000413117700003

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	OCT
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
EISSN	1544-1024
Keywords-Plus	SEVERE PLASTIC-DEFORMATION; HYSTERESIS PROPERTIES; MICROSTRUCTURE
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	irina\_tereshina@mail.ru gpolitova@gmail.com
ResearcherID-Numbers	Politova, Galina/K-2826-2015
ORCID-Numbers	Politova, Galina/0000-0003-1908-9677
Funding-Acknowledgement	RFBR {[}16-33-60226 mol-a-dk]; Russian Ministry of Science and Education {[}3.6121.2017/8.9]; UrFU {[}3.6121.2017/8.9]; national agencies of Poland (NCBR) within the project ``ERA.Net RUS Plus - EU {[}146-MAGNES, 609556]; HLD at HZDR of the European Magnetic Field Laboratory (EMFL)
Funding-Text	The work was supported by RFBR, pr. 16-33-60226 mol-a-dk. The authors would like to thank Dr. Krzysztof Rola for the SEM-EDS analysis. The work of N.V.K was supported by the state contracts between Russian Ministry of Science and Education and UrFU (No. 3.6121.2017/8.9). The research of K.R. was supported by national agencies of Poland (NCBR) within the project ``ERA.Net RUS Plus: No. 146-MAGNES{''} financed by the EU 7th FP, Grant No. 609556. We acknowledge the support of HLD at HZDR, member of the European Magnetic Field Laboratory (EMFL).
Number-of-Cited-References	30
Usage-Count-Last-180-days	4
Usage-Count-Since-2013	4
Journal-ISO	J. Mater. Eng. Perform.
Doc-Delivery-Number	FJ9RI