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Title: Symmetries and multiferroic properties of novel room-temperature magnetoelectrics: Lead iron tantalate – lead zirconate titanate (PFT/PZT)

Mixing 60-70% lead zirconate titanate with 40-30% lead iron tantalate produces a single-phase, low-loss, room-temperature multiferroic with magnetoelectric coupling: (PbZr0.53Ti0.47O3) (1-x)- (PbFe0.5Ta0.5O3)x. Our study combines x-ray scattering, magnetic and polarization hysteresis in both phases, plus a second-order dielectric divergence (to epsilon = 6000 at 475 K for 0.4 PFT; to 4000 at 520 K for 0.3 PFT) for an unambiguous assignment as a C2v-C4v (Pmm2-P4mm) transition. Furthermore, the material exhibits square saturated magnetic hysteresis loops with 0.1 emu/g at 295 K and saturation polarization Pr = 25 μC/cm2, which actually increases (to 40 μC/cm2) in the high-T tetragonal phase, representing an exciting new room temperature oxide multiferroic to compete with BiFeO3. Additional transitions at high temperatures (cubic at T>1300 K) and low temperatures (rhombohedral or monoclinic at T<250 K) are found. Finally, these are the lowest-loss room-temperature multiferroics known, which is a great advantage for magnetoelectric devices.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Univ. of Turabo, Gurabo (Puerto Rico). Dept. of Physics
  2. Univ. of Turabo, Gurabo (Puerto Rico). Inst. for Physical Chemical Applied Research
  3. Univ. of Turabo, Gurabo (Puerto Rico). Dept. of Physics; Univ. of Cambridge (United Kingdom). Dept. of Physics
Publication Date:
Grant/Contract Number:
NA0000672; FG02-08Er46526; FG 02-08ER46526
Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 1; Journal Issue: 4; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Turabo, Gurabo (Puerto Rico)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1114948
Alternate Identifier(s):
OSTI ID: 1336262