Magneto-electric effects in functionally stepped magnetic nanobilayers on ferroelectric substrates: Observation and theory on the influence of interlayer exchange coupling / Gribov I. V.,Osotov V. I.,Nosov A. P.,Petrov V. M.,Sreenivasulu G.,Srinivasan G. // JOURNAL OF APPLIED PHYSICS. - 2014. - V. 115, l. 19.

ISSN/EISSN:

0021-8979 / 1089-7550

Type:

Article

Abstract:

The strain mediated magnetoelectric (ME) coupling is studied in composites of functionally stepped ferromagnetic thin films on ferroelectric lead magnesium niobate-lead titanate substrates. Nanometer thick layers of nickel with negative piezomagnetic coefficient q and Fe0.81Ga0.19 (Galfenol) with positive q were deposited by pulsed laser deposition to achieve the desired step in q for the ferromagnetic phase. The measured maximum ME voltage coefficient (MEVC) ranges from 4.2 to 5.05 mV/(cm Oe) and shows a general increase with increasing Ni-to-Galfenol thickness ratio. Data on MEVC as a function of static field H show a large zero-bias ME coefficient. A model is developed for the ME effect that considers (i) the step in q in the magnetic layers of the ME composite and (ii) influence of the interlayer exchange interaction between Ni and Galfenol. Estimated bias magnetic field dependence of MEVC is in qualitative agreement with the experimental data. (C) 2014 AIP Publishing LLC.

Author keywords:

COMPOSITES

DOI:

10.1063/1.4878458

Web of Science ID:

ISI:000336920200042

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY 21
Publisher	AMER INST PHYSICS
Address	1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	193909
EISSN	1089-7550
Keywords-Plus	COMPOSITES
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
ResearcherID-Numbers	Gribov, Igor/J-5626-2013 Nosov, Alexandr/A-3003-2013
ORCID-Numbers	Gribov, Igor/0000-0002-5067-2281 Nosov, Alexandr/0000-0003-1475-0059 Gollapudi, Sreenivasulu/0000-0002-6136-7119
Funding-Acknowledgement	CRDF {[}RUE1-7031-EK-11]; Ural Branch of the Russian Academy of Sciences {[}12-U-2-1010]; Russian NSh {[}1540.2014.2]; National Science Foundation {[}ECCS-1307714, ECCS-MRI-1337716, DMR 0902701]; RFBR {[}13-02-98801]
Funding-Text	The research at the Institute of Metal Physics (IMP) and Oakland University (OU) were supported by the CRDF Grant No. RUE1-7031-EK-11. The research at IMP was also supported by the Ural Branch of the Russian Academy of Sciences, Grant No.12-U-2-1010 and by the Russian NSh (No. 1540.2014.2). The work at OU was also supported by grants from the National Science Foundation (Nos. ECCS-1307714, ECCS-MRI-1337716, and DMR 0902701). The work at Novgorod State University was supported by RFBR research Project No. 13-02-98801.
Number-of-Cited-References	44
Usage-Count-(Last-180-days)	3
Usage-Count-Since-2013	35
Journal-ISO	J. Appl. Phys.
Doc-Delivery-Number	AI5PA