skip to main content

SciTech ConnectSciTech Connect

Title: The effects of Co-Ti co-doping on the magnetic, electrical, and magnetodielectric behaviors of M-type barium hexaferrites

Magnetic, electrical and magnetodielectric properties have been studied in Co-Ti co-doped M-type hexaferrite BaCo{sub x}Ti{sub x}Fe{sub 12-2x}O{sub 19} (x = 0 ∼ 4). With the incorporation of Co-Ti, both their ferromagnetic magnetization and coercivity have been greatly changed. The temperature dependent magnetization curve shows a apparent hump at around 420 K, likely in association with more complicated cycloidal spin ordering, which is closely related to ferroelectric polarization. Interestingly, a significantly enhancement in resistivity (∼3 orders in magnitude) can be obtained in co-doped samples (x > 2), which is beneficial for magnetoelectric properties. The magnetoelectric effect were examined by dielectric tunibility under external magnetic field, which shows apparent tunability up to ∼−3% for sample with x = 2 at 1T magnetic field, further supporting it is a room temperature single phase mutliferroic material.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Institute for Advanced Materials, South China Normal University, Guangzhou 510006 (China)
  2. Department of Metallic Materials Science and Engineering, South China University of Technology, Guangzhou 510640 (China)
  3. Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22250875
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 3; Journal Issue: 12; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM; COERCIVE FORCE; DOPED MATERIALS; ELECTRICAL PROPERTIES; FERRITES; FERROELECTRIC MATERIALS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; POLARIZATION; TEMPERATURE DEPENDENCE