Room temperature multiferroic effects in superlattice nanocapacitors

被引：31

作者：

Dussan, S. ^{[1
,2
]}

Kumar, A. ^{[1
,2
]}

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

Priya, S. ^{[4
]}

Katiyar, R. 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

[4] Virginia Tech, Ctr Intelligent Mat Syst & Struct CIMSS, Blacksburg, VA 24061 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 25期

关键词：

MAGNETIC FERROELECTRICS; THIN-FILMS; MAGNETORESISTANCE; MEMORIES;

D O I：

10.1063/1.3528210

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A composite nanocapacitor was fabricated based on ferroelectric PbZr0.52Ti0.48O3( PZT) and half-metallic oxide La0.67Sr0.33MnO3(LSMO) with 5 nm/l nm periodicity, respectively. X-ray theta-2 theta scan and Phi-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 mu C/cm(2) and magnetization of 50 emu/cm(3) were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb( ZrxTi1-x)O-3 /LaxSr1-xMnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling. (C) 2010 American Institute of Physics. [doi:10.1063/1.3528210]

引用

页数：3

共 23 条

[1] The physics of ferroelectric memories [J].

Auciello, O ;

Scott, JF ;

Ramesh, R .

PHYSICS TODAY, 1998, 51 (07) :22-27

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

Bibes, Manuel ;

Barthelemy, Agnes .

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

[3] Magnetic effects on dielectric and polarization behavior of multiferroic heterostructures [J].

Dussan, Sandra ;

Kumar, Ashok ;

Scott, J. F. ;

Katiyar, Ram S. .

APPLIED PHYSICS LETTERS, 2010, 96 (07)

[4] Magnetoelectrics - A new route to magnetic ferroelectrics [J].

Ederer, C ;

Spaldin, NA .

NATURE MATERIALS, 2004, 3 (12) :849-851

[5] Giant sharp and persistent converse magnetoelectric effects in multiferroic epitaxial heterostructures [J].

Eerenstein, W. ;

Wiora, M. ;

Prieto, J. L. ;

Scott, J. F. ;

Mathur, N. D. .

NATURE MATERIALS, 2007, 6 (05) :348-351

[6] STRUCTURAL REFINEMENT OF SUPERLATTICES FROM X-RAY-DIFFRACTION [J].

FULLERTON, EE ;

SCHULLER, IK ;

VANDERSTRAETEN, H ;

BRUYNSERAEDE, Y .

PHYSICAL REVIEW B, 1992, 45 (16) :9292-9310

[7]

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

[8] Glasslike state in PbFe1/2Nb1/2O3 single crystal [J].

Kumar, Ashok ;

Katiyar, R. S. ;

Rinaldi, Carlos ;

Lushnikov, Sergey G. ;

Shaplygina, Tatjana A. .

APPLIED PHYSICS LETTERS, 2008, 93 (23)

[9] On the observation of negative magnetization under zero-field-cooled process [J].

Kumar, Nitesh ;

Sundaresan, A. .

SOLID STATE COMMUNICATIONS, 2010, 150 (25-26) :1162-1164

[10] Dielectric anomalies and spiral magnetic order in CoCr2O4 [J].

Lawes, G. ;

Melot, B. ;

Page, K. ;

Ederer, C. ;

Hayward, M. A. ;

Proffen, Th. ;

Seshadri, R. .

PHYSICAL REVIEW B, 2006, 74 (02)

← 1 2 3 →