Magnetic effects on dielectric and polarization behavior of multiferroic heterostructures

被引：53

作者：

Dussan, Sandra ^{[1
,2
]}

Kumar, Ashok ^{[1
,2
]}

Scott, J. F. ^{[1
,2
,3
]}

Katiyar, Ram S. ^{[1
,2
]}

机构：

[1] Univ Puerto Rico, Dept Phys, San Juan, PR 00931 USA

[2] Univ Puerto Rico, Inst Funct Nanomat, San Juan, PR 00931 USA

[3] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 0HE, England

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 07期

关键词：

dielectric losses; dielectric polarisation; dielectric thin films; ferromagnetic materials; ferromagnetic-paramagnetic transitions; lanthanum compounds; lead compounds; magnetisation; magnetoelectric effects; multiferroics; permittivity; pulsed laser deposition; strontium compounds; surface roughness; THIN-FILMS;

D O I：

10.1063/1.3327889

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3(PZT/LSMO) bilayer with surface roughness similar to 1.8 nm thin films have been grown by pulsed laser deposition on LaAlO3(LAO) substrates. High remnant polarization (30-54 mu C/cm(2)), dielectric constant (400-1700), and well saturated magnetization were observed depending upon the deposition temperature of the ferromagnetic layer and applied frequencies. Giant frequency-dependent change in dielectric constant and loss were observed above the ferromagnetic-paramagnetic temperature. The frequency dependent dielectric anomalies are attributed to the change in metallic and magnetic nature of LSMO and also the interfacial effect across the bilayer; an enhanced magnetoelectric interaction may be due to the Parish-Littlewood mechanism of inhomogeneity near the metal-dielectric interface.

引用

页数：3

共 14 条

[1] Multiferroics:: Towards a magnetoelectric memory [J].

Bibes, Manuel ;

Barthelemy, Agnes .

NATURE MATERIALS, 2008, 7 (06) :425-426

[2] Multiferroic and magnetoelectric materials [J].

Eerenstein, W. ;

Mathur, N. D. ;

Scott, J. F. .

NATURE, 2006, 442 (7104) :759-765

[3] Tunnel junctions with multiferroic barriers [J].

Gajek, Martin ;

Bibes, Manuel ;

Fusil, Stephane ;

Bouzehouane, Karim ;

Fontcuberta, Josep ;

Barthelemy, Agnes ;

Fert, Albert .

NATURE MATERIALS, 2007, 6 (04) :296-302

[4] CMR manganites: physics, thin films and devices [J].

Haghiri-Gosnet, AM ;

Renard, JP .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (08) :R127-R150

[5]

Hill NA, 2000, J PHYS CHEM B, V104, P6694, DOI [10.1021/jp000114x, 10.1021/jpc00114x]

[6] Magnetoelectric effect in epitaxial Pb(Zr0.52Ti0.48)O3/La0.7Sr0.3MnO3 composite thin film [J].

Ma, Y. G. ;

Cheng, W. N. ;

Ning, M. ;

Ong, C. K. .

APPLIED PHYSICS LETTERS, 2007, 90 (15)

[7] Hydrogen adsorption in mesoporous carbons [J].

Pang, JB ;

Hampsey, JE ;

Wu, ZW ;

Hu, QY ;

Lu, YF .

APPLIED PHYSICS LETTERS, 2004, 85 (21) :4887-4889

[8] Magnetocapacitance in Nonmagnetic Composite Media [J].

Parish, Meera M. ;

Littlewood, Peter B. .

PHYSICAL REVIEW LETTERS, 2008, 101 (16)

[9] Direct evidence for a half-metallic ferromagnet [J].

Park, JH ;

Vescovo, E ;

Kim, HJ ;

Kwon, C ;

Ramesh, R ;

Venkatesan, T .

NATURE, 1998, 392 (6678) :794-796

[10] Multiferroics: progress and prospects in thin films [J].

Ramesh, R. ;

Spaldin, Nicola A. .

NATURE MATERIALS, 2007, 6 (01) :21-29

← 1 2 →