Nuclear Forward Scattering Application to the Spiral Magnetic Structure Study in ε−Fe2O3 | Sciact - CRIS-system of Boreskov Institute of Catalysis

Nuclear Forward Scattering Application to the Spiral Magnetic Structure Study in ε−Fe2O3 Full article

Journal

Physical Review B (started in 2016)
ISSN: 2469-9950 , E-ISSN: 2469-9969

Output data

Year: 2020, Volume: 101, Number: 9, Article number : 094408, Pages count : 9 DOI: 10.1103/physrevb.101.094408

Tags

Forward scattering Ground state Hematite Magnetic fields Magnetic structure Synchrotron radiation Synchrotrons Temperature distribution

Authors

Knyazev Yu.V. ¹ , Chumakov A.I. ² , Dubrovskiy A.A. ¹ , Semenov S.V. ¹ , Sergueev I. ³ , Yakushkin S.S. ⁴ , Kirillov V.L. ⁴ , Martyanov O.N. ⁴ , Balaev D.A. ¹

Affiliations

1	Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, Building 38, Krasnoyarsk, 660036 Russia
2	ESRF—The European Synchrotron, 71 Avenue des Martyrs CS40220, F-38043 Grenoble Cedex 9, France
3	Deutsches Elektronen-Synchrotron DESY, 22607, Hamburg, Germany
4	Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Novosibirsk, 630090 Russia

Funding (1)

Russian Science Foundation

17-12-01111

The ε-Fe2O3 magnetic structure has been analyzed using the synchrotron radiation source. Time spectra of nuclear forward scattering for isolated nanoparticles with an average size of 8 nm immobilized in a xerogel matrix have been recorded in the temperature range of 4–300 K in applied magnetic fields of 0–4 T in the longitudinal direction at the European Synchrotron Radiation Facility (ESRF, Grenoble, France). It has been found that the external magnetic field does not qualitatively change the Hhf (T) behavior, but makes a strong opposite impact on the hyperfine fields in the nonequivalent iron sites, leading to the divergence of Hhf polar angle dependences below 80 K. A complete diagram of the ε-Fe2O3 magnetic structure in the temperature range of 4–300 K is proposed. At 300 K, the ε-Fe2O3 compound is confirmed to be a collinear ferrimagnet. The experimental results show that the magnetic transition at 150–80 K leads to the formation of a noncollinear magnetic structure. Furthermore, in the range of the 80–4 K, the ground state of a magnetic spiral is established. The experimental results are supplemented by the analysis of the exchange interactions and temperature dependence of the magnetization in a magnetic field of 7 T.

Knyazev Y.V. , Chumakov A.I. , Dubrovskiy A.A. , Semenov S.V. , Sergueev I. , Yakushkin S.S. , Kirillov V.L. , Martyanov O.N. , Balaev D.A.
Nuclear Forward Scattering Application to the Spiral Magnetic Structure Study in ε−Fe2O3

Physical Review B (started in 2016). 2020. V.101. N9. 094408 :1-9. DOI: 10.1103/physrevb.101.094408 WOS Scopus РИНЦ AN OpenAlex

Full text from publisher

Submitted:	Nov 28, 2019
Accepted:	Feb 19, 2020
Published print:	Mar 1, 2020
Published online:	Mar 6, 2020

Web of science:	WOS:000518435300001
Scopus:	2-s2.0-85083257160
Elibrary:	43264358
Chemical Abstracts:	2020:920320
OpenAlex:	W3012423583

DB	Citing
Web of science	10
Scopus	8
Elibrary	7
OpenAlex	10