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Uniaxial magnetic anisotropy in Co2.25Fe0.75O2BO3 compared to Co3O2BO3 and Fe3O2BO ludwigites / J. . Bartolome [et al.] // Phys. Rev. B. - 2011. - Vol. 83, Is. 14. - Ст. 144426, DOI 10.1103/PhysRevB.83.144426. - Cited References: 25. - The authors acknowledge V. V. Rudenko for the oxyborate samples they made and O. A. Bayukov for fruitful discussion. The financial support of Spanish MINCYT, Grant No. MAT08/1077, and the Aragonese E-34 project are acknowledged. Fruitful discussions with F. Bartolome and P. Bordet are acknowledged. The latter is thanked for providing the FeINF3/INFOINF2/INFBOINF3/INF single crystal. Also this study was supported by the Russian Foundation for Basic Research (Project No. 09-02-00171-a), the Federal Agency for Science and Innovation (Rosnauka) (Project No. MK-5632.2010.2), and the Physical Division of the Russian Academy of Science (Program "Strongly Correlated Electrons," Project No. 2.3.1).
. - ISSN 1098-0121РУБ Physics, Condensed Matter
Рубрики:
CRYSTAL-STRUCTURE
MOSSBAUER
CO3BO5
Аннотация: Magnetic and Mossbauer spectroscopy (MS) measurements have been performed on a single crystal of Co2.25Fe0.75O2BO3 with ludwigite structure. Two magnetic transitions (T-N = 115 K and T-C = 70 K) were traced from the ac susceptibility temperature dependence. The MS spectra as a function of temperature clearly show the onset of magnetic ordering below 115 K. Magnetization measurements on the parent Co3O2BO3 and Fe3O2BO3 compounds have been done for comparison. In Fe3O2BO3 the anisotropy of the different phases has been determined, showing that the anisotropy axis changes from the a to the b axis in the low-temperature antiferromagnetic phase. High magnetic uniaxial anisotropy has been detected for both Co3O2BO3 and Co2.25Fe0.75O2BO3. From the angle-dependent magnetization measurements it is found that in both compounds the easy axis of magnetization is the b [010] axis, where an antiferromagnetic component is superimposed on the main ferromagnetic component. In the c direction the behavior is purely antiferromagnetic. In Co2.25Fe0.75O2BO3 a strong reduction of the remanent magnetization and a very strong increase in coercive field along the b axis with respect to those found in Co3O2BO3 were observed from magnetic hysteresis cycles measured below T-C. The increase of coercive field is caused by the increase of defects upon Co substitution by Fe.
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Держатели документа:
[Bartolome, J.] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
[Bartolome, J.] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
[Arauzo, A.] Univ Zaragoza, Serv Instrumentac Cientif, Area Medidas Fis, E-50009 Zaragoza, Spain
[Kazak, N. V.
Ovchinnikov, S. G.] RAS, SB, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ivanova, N. B.
Knyazev, Yu. V.] Siberian Fed Univ, Krasnoyarsk 660074, Russia
[Ivanova, N. B.] Krasnoyarsk State Agrarian Univ, Krasnoyarsk, Russia
[Ovchinnikov, S. G.] Siberian State Aerosp Univ, Krasnoyarsk, Russia
[Lyubutin, I. S.] RAS, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
ИФ СО РАН
Instituto de Ciencia de Materiales de Aragon, Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
Servicio de Instrumentacion Cientifica, Area de Medidas Fisicas, Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
L.V. Kirensky Institute of Physics, SB of RAS, 660036, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Kirensky street 26, 660074, Krasnoyarsk, Russian Federation
Krasnoyarsk State Agrarian University, Mira street 90, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarskiy Rabochiy street 31, Krasnoyarsk, Russian Federation
Shubnikov Institute of Crystallography, RAS, Leninskiy prospect 59, 119333, Moscow, Russian Federation
Доп.точки доступа:
Bartolome, J.; Arauzo, A.; Kazak, N. V.; Казак, Наталья Валерьевна; Ivanova, N. B.; Иванова, Наталья Борисовна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Lyubutin, I. S.
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