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A Highly Efficient Self‐Biased Nickel‐Zinc Ferrite/Metglas/PZT Magnetoelectric Gyrator
Author(s) -
Leung Chung Ming,
Sreenivasulu G.,
Zhuang Xin,
Tang Xiao,
Gao Min,
Xu Junran,
Li Jiefang,
Zhang Jitao,
Srinivasan G.,
Viehland D.
Publication year - 2018
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800043
Subject(s) - metglas , materials science , gyrator , ferrite (magnet) , nuclear magnetic resonance , optoelectronics , composite material , electrical engineering , amorphous metal , physics , engineering , alloy
A high efficiency self‐biased magnetoelectric (ME) gyrator operating under zero magnetic bias field ( H Bias = 0) was developed. It consists of a three‐phase nickel‐zinc ferrite/Metglas/piezoelectric longitudinal–transverse ( L‐T ) ME laminate and a solenoid. Laminates with different length–width ( L/W ) ratios, together with various thickness (number of Metglas foils) ratios between ferrite and Metglas layers, were studied. A maximum power conversion efficiency ( η ) of 72% was found at the fundamental electromechanical resonance for a high L/W ratio of 18.7. The high zero‐bias η could be attributed to a higher mechanical quality factor ( Q m ) and the low demagnetization effect ( N z ) of nickel‐zinc ferrite laminates of higher L/W . Eliminating the external magnetic bias will facilitate miniaturization of ME gyrators for use in portable electronics and medical applications.