Role of annealing conditions on the ferromagnetic and dielectric properties of La2NiMnO6

被引：63

作者：

Sayed, Farheen N. ^{[1
]}

Achary, S. N. ^{[1
]}

Jayakumar, O. D. ^{[1
]}

Deshpande, S. K. ^{[2
]}

Krishna, P. S. R. ^{[3
]}

Chatterjee, S. ^{[4
]}

Ayyub, P. ^{[4
]}

Tyagi, A. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Mumbai 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, UGC DAE Consortium Sci Res, Mumbai 400085, Maharashtra, India

[3] Bhabha Atom Res Ctr, Div Solid State Phys, Mumbai 400085, Maharashtra, India

[4] Tata Inst Fundamental Res, Dept Condensed Matter Phys, Mumbai 400005, Maharashtra, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2011年 / 26卷 / 04期

基金：

美国国家科学基金会;

关键词：

MAGNETIC-PROPERTIES; BULK;

D O I：

10.1557/jmr.2011.4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La2NiMnO6 (LNMO) was prepared by a combustion method followed by heating at high temperature. Subsequently, the preformed LNMO was annealed in air, oxygen, or N-2 atmosphere and characterized by powder x-ray diffraction (XRD), neutron diffraction, superconducting quantum interference device magnetometry, and dielectric analysis. Structural studies by XRD and neutron diffraction revealed the coexistence of partially cation disordered monoclinic (31%) and rhombohedral (69%) phases in the sample annealed in air. However, the sample annealed in oxygen shows about 50:50% of monoclinic and rhombohedral phases. Relaxor-like behavior with relative permittivity of the order of 10(4) was observed in the sample annealed in air, while relative permittivity decreases to about 200 in samples annealed in oxygen atmosphere. The magnetic properties indicate a well-defined ferromagnetic phase in the oxygen-annealed sample compared to a feeble ferromagnetic signature in the air-annealed one. The dielectric and ferromagnetism of LNMO samples have been related to formation and annihilation of oxygen vacancies.

引用

页码：567 / 577

页数：11

共 34 条

[1] MAGNETIZATION MEASUREMENTS AND MN-55 NMR-STUDIES OF LANI0.5MN0.5O3 [J].

ASAI, K ;

SEKIZAWA, H ;

IIDA, S .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1979, 47 (04) :1054-1060

[2] Magnetic properties of LaNi1-xMnxO3+δ perovskites [J].

Blasco, J ;

García, J ;

Sánchez, MC ;

Campo, J ;

Subías, G ;

Pérez-Cacho, J .

EUROPEAN PHYSICAL JOURNAL B, 2002, 30 (04) :469-479

[3] Synthesis and structural study of LaNi1-xMnxO3+δ perovskites [J].

Blasco, J ;

Sánchez, MC ;

Pérez-Cacho, J ;

García, J ;

Subías, G ;

Campo, J .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2002, 63 (05) :781-792

[4] FERROMAGNETIC INTERACTIONS IN NON-METALLIC PEROVSKITES [J].

BLASSE, G .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1965, 26 (12) :1969-&

[5] An investigation of structural, magnetic and dielectric properties of R2NiMnO6 (R = rare earth, Y) [J].

Booth, R. J. ;

Fillman, R. ;

Whitaker, H. ;

Nag, Abanti ;

Tiwari, R. M. ;

Ramanujachary, K. V. ;

Gopalakrishnan, J. ;

Lofland, S. E. .

MATERIALS RESEARCH BULLETIN, 2009, 44 (07) :1559-1564

[6] Determination of B-site ordering and structural transformations in the mixed transition metal perovskites La2CoMnO6 and La2NiMnO6 [J].

Bull, CL ;

Gleeson, D ;

Knight, KS .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (29) :4927-4936

[7] Grain size and domain size relations in bulk ceramic ferroelectric materials [J].

Cao, WW ;

Randall, CA .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1996, 57 (10) :1499-1505

[8] Oxygen stoichiometry, ferromagnetism, and transport properties of La2-xNiMnO6+δ -: art. no. 064415 [J].

Dass, RI ;

Yan, JQ ;

Goodenough, JB .

PHYSICAL REVIEW B, 2003, 68 (06)

[9] Multiple magnetic phases of La2CoMnO6-δ (0≤δ≤0.05) -: art. no. 014401 [J].

Dass, RI ;

Goodenough, JB .

PHYSICAL REVIEW B, 2003, 67 (01)

[10] Orbital ordering as the determinant for ferromagnetism in biferroic BiMnO3 -: art. no. 064425 [J].

dos Santos, AM ;

Cheetham, AK ;

Atou, T ;

Syono, Y ;

Yamaguchi, Y ;

Ohoyama, K ;

Chiba, H ;

Rao, CNR .

PHYSICAL REVIEW B, 2002, 66 (06) :644251-644254

← 1 2 3 4 →