Irradiation-induced amorphized state of rapidly quenched R12Fe82B6 alloys (R = Nd, Er) / Teplykh A. E.,Chukalkin Yu. G.,Bogdanov S. G.,Skryabin Yu. N.,Kudrevatykh N. V.,Andreev S. V.,Volegov A. S.,Kozlov A. I.,Choi Y.,Pirogov A. N. // PHYSICS OF METALS AND METALLOGRAPHY. - 2012. - V. 113, l. 6. - P. 566-574.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Rapidly quenched (RQ) alloys R 12Fe82B6 (R = Nd, Er) have been prepared by melt spinning. Their magnetic properties, structure, and phase composition have been studied before and after fast-neutron irradiation to a fluence of 1.2 x 10(20) n/cm(2). Before irradiation, it is the Nd2Fe14B-type phase (space group P4(2)/mnm) that is mainly present in the RQ alloys at 295 K. In the Nd12Fe82B6 alloy, this phase has a ferro-magnetic structure with magnetic moments at the Nd and Fe atoms oriented parallel to the c axis; the Er2Fe14B phase found in the Er12Fe82B6 alloy is characterized by a ferrimagnetic order of Er and Fe magnetic moments parallel to the basal plane. After irradiation, the crystalline state of both RQ alloys transforms into an amorphous state. The ferro- and ferrimagnetic orders are retained in them, but the Curie temperature of the alloys with Nd and Er decreases by 100 and 200 K, respectively. The spontaneous magnetization of the irradiated alloys at 5 K is approximately equal to their magnetization in the crystalline state, whereas their coercive force is lower than that for the alloys before irradiation by two orders of magnitude. The effects observed are explained by the dispersion of Fe-Fe exchange interactions resulting from the dispersion of interatomic spacings in the amorphous alloys.

Author keywords:

permanent magnets; fast-neutron irradiation; ferromagnetic order; ferrimagnetic order; neutron diffraction FE-B; MAGNETIC-PROPERTIES; DIFFRACTION; SCATTERING

DOI:

10.1134/S0031918X12060105

Web of Science ID:

ISI:000305131200004

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	FE-B; MAGNETIC-PROPERTIES; DIFFRACTION; SCATTERING
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Bogdanov, Savva/K-1613-2013 Yurii, Chukalkin/J-7670-2013 Pirogov, Alexander/K-8115-2013 Skryabin, Yuri/J-4786-2013 Aleksander, Teplykh/J-5571-2013
ORCID-Numbers	Bogdanov, Savva/0000-0003-2327-1180 Yurii, Chukalkin/0000-0001-5200-479X Pirogov, Alexander/0000-0001-7321-1245 Skryabin, Yuri/0000-0001-7503-5425 Aleksander, Teplykh/0000-0002-3698-9100
Funding-Acknowledgement	Ministry of Education and Science {[}16.518.11.7032]; Presidium of Russian Academy of Sciences; Ural Branch of Russian Academy of Sciences {[}09-P-2-1010]; Division of Physical Sciences of Russian Academy of Sciences {[}09-T-2-1012]
Funding-Text	The study was performed in accordance with the plan of the Russian Academy of Sciences (theme no. 01.2.006 13394, code ``Impul's{''}) and was supported in part by the Ministry of Education and Science (State Contract no. 16.518.11.7032); by the Presidium of the Russian Academy of Sciences and Ural Branch of the Russian Academy of Sciences (program for basic research ``Quantum Physics of Condensed Media,{''} project no. 09-P-2-1010); and by the Division of Physical Sciences of the Russian Academy of Sciences, program `` Neutron Studies of the Substance Structure and Fundamental Properties of Matter{''} (project no. 09-T-2-1012, Ural Branch, Russian Academy of Sciences). We thank A. N. Bogatkina for the assistance in the preparation of initial alloys.
Number-of-Cited-References	16
Usage-Count-Since-2013	10
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	957AP