Size-dependent exchange bias in half-doped manganite nanoparticles

Zhou, S. M.; Shi, L.; Yang, H. P.; Wang, Y.; He, L. F.; Zhao, J. Y.
November 2008
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p182509
Academic Journal
Magnetic properties of the nanosized half-doped manganite of Sm0.5Ca0.5MnO3 with different particle sizes prepared by a sol-gel method are investigated. Exchange-bias phenomena are observed in the field-cooled magnetic hysteresis loops for these nanoparticles. The values of the exchange field, coercivity, remanence asymmetry, and remanent magnetization are found to depend strongly on the particle size. Particularly, as the particle size decreases, the exchange field shows a nonmonotonic variation with a maximum at ∼120 nm. These magnetic behaviors have been explained in terms of size effects on the charge ordered and antiferromagnetic manganite nanoparticles.


Related Articles

  • Size-driven magnetic transitions in La1/3Ca2/3MnO3 nanoparticles. Markovich, V.; Fita, I.; Wisniewski, A.; Mogilyansky, D.; Puzniak, R.; Titelman, L.; Gorodetsky, G. // Journal of Applied Physics;Oct2010, Vol. 108 Issue 6, p063918 

    Magnetic properties of electron-doped La1/3Ca2/3MnO3 manganite nanoparticles with average particle size ranging from 12 to 42 nm, prepared by the glycine-nitrate method, have been investigated in temperature range 5-300 K and in magnetic fields up to 90 kOe. Reduction in the particle size...

  • Observation of Co/CoO nanoparticles below the critical size for exchange bias. Dobrynin, A. N.; Temst, K.; Lievens, P.; Margueritat, J.; Gonzalo, J.; Afonso, C. N.; Piscopiello, E.; Van Tendeloo, G. // Journal of Applied Physics;6/1/2007, Vol. 101 Issue 11, p113913 

    We compare the magnetic properties of pure and oxidized Co nanoparticles embedded in an amorphous Al2O3 matrix. Nanoparticles with diameters of 2 or 3 nm were prepared by alternate pulsed laser deposition in high vacuum conditions, and some of them were exposed to O2 after production and before...

  • Experimental Evidence for a Magnetic Two-Phase State in Manganites. Demin, R. V.; Koroleva, L. I.; Szymszak, R.; Szymszak, H. // JETP Letters;4/10/2002, Vol. 75 Issue 7, p331 

    It is found that samples of manganites La[sub 0.9]Sr[sub 0.1]MnO[sub 3] (single crystal), Eu[sub 0.7]A[sub 0.3]MnO[sub 3] (A = Ca, Sr; ceramics), and La[sub 0.1]Pr[sub 0.6]Ca[sub 0.3]MnO[sub 3] and La[sub 0.84]Sr[sub 0.16]MnO[sub 3] (thin epitaxial films) that are either field-cooled (in a...

  • Evidence of exchange bias effect and surface spin glass ordering in electron doped Sm0.09Ca0.91MnO3 nanomanganites. Giri, S. K.; Poddar, A.; Nath, T. K. // Journal of Applied Physics;Dec2012, Vol. 112 Issue 11, p113903 

    We report here the magnetic properties of slightly electron-doped Sm1-xCaxMnO3 manganites with the doping level of x = 0.91. Exchange bias effect has been observed in the nanomanagnites system and can be tuned by the strength of cooling field. Magnetic training effect as well as systematic shift...

  • Magnetic anisotropy induced by high energy ball milling of Fe2MnAl. Vinesh, A.; Bhargava, Hina; Lakshmi, N.; Venugopalan, K. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07A309 

    The effect of disorder and magnetic properties of nanosized Fe2MnAl Heusler alloy has been studied using a combination of x-ray diffraction, 57Fe Mössbauer spectroscopy, and dc magnetization. X-ray diffraction spectrum of as-milled sample shows texturing in (400) plane. Mössbauer and dc...

  • Al-doped Fe3O4 Nanoparticles and Their Magnetic Properties. Xue Wang; Chen Guo Hu; Yi Xi; Chuan Hui Xia; Xiao Shan He // Journal of Superconductivity & Novel Magnetism;Aug2010, Vol. 23 Issue 6, p909 

    Al-doped Fe3O4 nanoparticles were synthesized for the first time via the Composite-Hydroxide-Mediated (CHM) method from Fe3O4 and Al2O3 without using any capping agent. The synthesis technique was one-step and cost effective. The obtained products were characterized by X-ray diffraction (XRD),...

  • SÍNTESIS, CARACTERIZACIÓN Y PROPIEDADES MAGNÉTICAS DE LAS NANOPARTÍCULAS DE CoFe2O4 USANDO PEG COMO SURFACTANTE. Briceño, Sarah; Brämer-Escamilla, Werner; Silva, Pedro; Delgado, Gerzon E.; Diaz, Yraida; Plaza, Eric; Cañizales, Edgard // La Revista Latinoamericana de Metalurgia y Materiales, RLMM;2013, Vol. 33 Issue 1, p156 

    Cobalt ferrite (CoFe2O4) nanoparticles were synthesized using polyethyleneglycol as surfactant in a simple reflux system and subsequently heat treated from 200°C to 800°C in N2 atmosphere. The samples were characterized using: X-ray diffraction, Infrared spectroscopy, Scanning electron...

  • γ-Fe2O3 nanoparticles dispersed in porous Vycor glass: A magnetically diluted integrated system. Cangussu, Danielle; Nunes, Wallace Castro; Corrêa, Heberton Luis da Silva; Macedo, Waldemar Augusto de Almeida; Knobel, Marcelo; Alves, Oswaldo Luiz; Filho, Antônio Gomes Souza; Mazali, Italo Odone // Journal of Applied Physics;Jan2009, Vol. 105 Issue 1, p013901 

    An investigation of the effect of interparticle interaction and particle size distribution has been carried out on iron oxide nanoparticles dispersed into porous Vycor glass. γ-Fe2O3 nanoparticles dispersed into monoliths of Vycor glass were obtained using impregnation-decomposition cycles...

  • Controlled-synthesis, characterization, and magnetic properties of Fe3O4 nanostructures. Wan, J.; Yao, Y.; Tang, G. // Applied Physics A: Materials Science & Processing;Nov2007, Vol. 89 Issue 2, p529 

    Fe3O4 nanostructures with different morphologies, including uniform nanoparticles, nanorods and nanowire bundles, have been successfully synthesized via a facile hydrothermal route. Based on the observation of TEM images, the growth mechanism of one-dimensional Fe3O4 nanostructures is in...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics