Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis

被引：167

作者：

Limaye, Mukta V. ^{[1
]}

Singh, Shashi B. ^{[1
]}

Das, Raja ^{[2
]}

Poddar, Pankaj ^{[2
]}

Kulkarni, Sulabha K. ^{[3
]}

机构：

[1] Univ Pune, Dept Phys, DST Unit Nanosci, Pune 411007, Maharashtra, India

[2] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India

[3] Indian Inst Sci Educ & Res, DST Unit Nanosci, Pune 411021, Maharashtra, India

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 02期

关键词：

Diluted magnetic semiconductors; Nanostructures; ZnO; MAGNETIC-PROPERTIES; CAPPED CDSE; ZINC; PHOTOLUMINESCENCE; NANOPARTICLES; RESONANCE; GROWTH; DONOR;

D O I：

10.1016/j.jssc.2010.11.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

One-dimensional (1D) undoped and Fe doped ZnO nanorods of average length similar to 1 mu m and diameter similar to 50 nm have been obtained using a microwave-assisted synthesis. The magnetization (M) and coercivity (H-c) value obtained for undoped ZnO nanorods at room temperature is similar to 5 X 10(-3) emu/g and similar to 150 Oe, respectively. The Fe doped ZnO samples show significant changes in M -H loop with increasing doping concentration. Both undoped and Fe doped ZnO nanorods exhibit a Curie transition temperature (T-c) above 390 K. Electron spin resonance and Mossbauer spectra indicate the presence of ferric ions. The origin of ferromagnetism in undoped ZnO nanorods is attributed to localized electron spin moments resulting from surface defects/vacancies, where as in Fe doped samples is explained by F center exchange mechanism. (C) 2010 Published by Elsevier Inc.

引用

页码：391 / 400

页数：10

共 75 条

[1] Luminescence quenching in ZnS nanoparticles due to Fe and Ni doping [J].

Borse, PH ;

Deshmukh, N ;

Shinde, RF ;

Date, SK ;

Kulkarni, SK .

JOURNAL OF MATERIALS SCIENCE, 1999, 34 (24) :6087-6093

[2] NOTE ON THE PARAMAGNETIC RESONANCE OF IRON IN GLASS [J].

CASTNER, T ;

NEWELL, GS ;

HOLTON, WC ;

SLICHTER, CP .

JOURNAL OF CHEMICAL PHYSICS, 1960, 32 (03) :668-673

[3] Donor impurity band exchange in dilute ferromagnetic oxides [J].

Coey, JMD ;

Venkatesan, M ;

Fitzgerald, CB .

NATURE MATERIALS, 2005, 4 (02) :173-179

[4] Ferromagnetism in Fe-doped SnO2 thin films [J].

Coey, JMD ;

Douvalis, AP ;

Fitzgerald, CB ;

Venkatesan, M .

APPLIED PHYSICS LETTERS, 2004, 84 (08) :1332-1334

[5] Controlling the growth and luminescence properties of well-faceted ZnO nanorods [J].

De la Rosa, E. ;

Sepulveda-Guzman, S. ;

Reeja-Jayan, B. ;

Torres, A. ;

Salas, P. ;

Elizondo, N. ;

Yacaman, M. Jose .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (24) :8489-8495

[6] UV optical properties of ferromagnetic Mn-doped ZnO thin films grown by PLD [J].

Diaconu, M ;

Schmidt, H ;

Hochmuth, H ;

Lorenz, M ;

Benndorf, G ;

Lenzner, J ;

Spemann, D ;

Setzer, A ;

Nielsen, KW ;

Esquinazi, P ;

Grundmann, M .

THIN SOLID FILMS, 2005, 486 (1-2) :117-121

[7] Flowerlike ZnO nanocones and nanowires: Preparation, structure, and luminescence [J].

Du, G. H. ;

Xu, F. ;

Yuan, Z. Y. ;

Van Tendeloo, G. .

APPLIED PHYSICS LETTERS, 2006, 88 (24)

[8] Nanoengineered Curie temperature in laterally patterned ferromagnetic semiconductor heterostructures [J].

Eid, KF ;

Sheu, BL ;

Maksimov, O ;

Stone, MB ;

Schiffer, P ;

Samarth, N .

APPLIED PHYSICS LETTERS, 2005, 86 (15) :1-3

[9] Dilute-defect magnetism: Origin of magnetism in nanocrystalline CeO2 [J].

Fernandes, V. ;

Mossanek, R. J. O. ;

Schio, P. ;

Klein, J. J. ;

de Oliveira, A. J. A. ;

Ortiz, W. A. ;

Mattoso, N. ;

Varalda, J. ;

Schreiner, W. H. ;

Abbate, M. ;

Mosca, D. H. .

PHYSICAL REVIEW B, 2009, 80 (03)

[10] Magnetism in dilute magnetic oxide thin films based on SnO2 [J].

Fitzgerald, C. B. ;

Venkatesan, M. ;

Dorneles, L. S. ;

Gunning, R. ;

Stamenov, P. ;

Coey, J. M. D. ;

Stampe, P. A. ;

Kennedy, R. J. ;

Moreira, E. C. ;

Sias, U. S. .

PHYSICAL REVIEW B, 2006, 74 (11)

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