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Title: Electric polarization observed in single crystals of multiferroic Lu 2 MnCoO 6

Journal Article · · Physical Review B

We report electric polarization and magnetization measurements in single crystals of double perovskite Lu2MnCoO6 using pulsed magnetic fields and optical second harmonic generation in dc magnetic fields. We observe well-resolved magnetic field-induced changes in the electric polarization in single crystals and thereby resolve the question about whether multiferroic behavior is intrinsic to these materials or is an extrinsic feature of polycrystals. We find electric polarization along the crystalline b axis, that is suppressed by applying a magnetic fields along the c axis, and advance a model for the origin of magnetoelectric coupling. We furthermore map the phase diagram using both capacitance and electric polarization to identify regions of ordering and regions of magnetoelectric hysteresis. This compound is a rare example of coupled hysteretic behavior in the magnetic and electric properties. Furthermore, the ferromagneticlike magnetic hysteresis loop that couples to hysteretic electric polarization can be attributed not to ordinary ferromagnetic domains, but to the rich physics of magnetic frustration of Ising-like spins in the axial next-nearest-neighbor interaction model.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1338804
Alternate ID(s):
OSTI ID: 1253432
Report Number(s):
LA-UR-16-21949; PRBMDO
Journal Information:
Physical Review B, Vol. 93, Issue 18; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (4)

Magnetoelectric behavior via a spin state transition journal September 2019
Giant Anisotropic Magnetocaloric Effect in Double-perovskite Gd2CoMnO6 Single Crystals journal November 2017
Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite journal April 2019
Magnetocaloric effect and influence of Fe/Cr disorder on the magnetization reversal and dielectric relaxation in R Fe 0.5 Cr 0.5 O 3 systems journal May 2017