Mossbauer investigation of γ-Fe2O3 nanocrystals in silica matrix prepared by the sol-gel method

被引：0
作者：
Cannas, C
Concas, G
Congiu, F
Musinu, A
Piccaluga, G
Spano, G
机构：
[1] Univ Cagliari, Dipartimento Fis, I-09042 Cagliari, Italy
[2] INFM, I-09042 Cagliari, Italy
[3] Univ Cagliari, Dipartimento Sci Chim, I-09042 Cagliari, Italy
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 2002年 / 57卷 / 3-4期
关键词：
nanostructures; oxides; sol-gel growth; Mossbauer spectroscopy; magnetic properties;
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of Fe2O3-SiO2 nnocomposites (25 weight % of Fe2O3) has been prepared using a sol-gel method, Samples showing different features were obtained by varying the evaporation conditions acting on the surface / volume ratio of the starting sol. The samples were investigated using Mossbauer spectroscopy at low temperature. The Fe2O3 nanoparticles have been identified as maghemite (gamma-Fe2O3) particles. The samples show a superparamagnetic behavior with a blocking temperature that depends on the average particle size.
引用
收藏
页码：154 / 158
页数：5
相关论文
共 50 条
  • [21] Citric acid concentration tune of structural and magnetic properties in hematite (α-Fe2O3) nanoparticles synthesized by sol-gel method
    Utari
    Maulidina, Hikmah
    Arilasita, Retna
    Widiyandari, Hendri
    Suharno, Budi
    Purnama, Budi
    MATERIALS RESEARCH EXPRESS, 2023, 10 (03)
  • [22] Magnetic properties of Ba4Co2Fe36O60 nanocrystals prepared through a sol-gel method
    Xiong, G
    Xu, M
    Mai, ZH
    SOLID STATE COMMUNICATIONS, 2001, 118 (01) : 53 - 58
  • [23] Investigation on synthesis and characterization of Fe-doped Al2O3 nanocrystals by new sol-gel precursors
    Khodadadi, Abolfazl
    Farahmandjou, Majid
    Yaghoubi, Mojtaba
    MATERIALS RESEARCH EXPRESS, 2019, 6 (02)
  • [24] Mossbauer study of SnO2 powders doped with dilute 57Fe prepared by a sol-gel method
    Nomura, K.
    Barrero, C.
    Sakuma, J.
    Takeda, M.
    CZECHOSLOVAK JOURNAL OF PHYSICS, 2006, 56 : E75 - E81
  • [25] Synthesis of granular Fe-Al2O3 by the sol-gel method
    Santos, A
    Ardisson, JD
    Tambourgi, EB
    Macedo, WAA
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 177 : 247 - 248
  • [26] Low temperature transformation from γ-Fe2O3 to Ti doped α-Fe2O3 nanoparticles through an epoxide assisted sol-gel route
    Wang, Bo
    Song, Yuanming
    Ren, Wanzhong
    Xu, Wenyou
    Cui, Hongtao
    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2009, 51 (01) : 119 - 123
  • [27] Photoluminescence study of ZnO-SiO2 nanostructures grown in silica matrix obtained via sol-gel method
    Shastri, Lokesh
    Qureshi, M. S.
    Malik, M. M.
    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2013, 74 (04) : 595 - 598
  • [28] Sol-Gel Synthesis and Micro-Raman Characterization of ε-Fe2O3 Micro- and Nanoparticles
    Lopez-Sanchez, J.
    Serrano, A.
    Del Campo, A.
    Abuin, M.
    Rodriguez de la Fuente, O.
    Carmona, N.
    CHEMISTRY OF MATERIALS, 2016, 28 (02) : 511 - 518
  • [29] Atomic migration in Co0.9Mn0.1Fe2O4 prepared by a sol-gel method
    Kim, WC
    Yi, YS
    An, SY
    Lee, SW
    Ji, SH
    Kim, CS
    EUROPEAN MAGNETIC MATERIALS AND APPLICATIONS, 2001, 373-3 : 757 - 760
  • [30] Investigation of electrical studies of spinel FeCo2O4 synthesized by sol-gel method
    Lobo, Laurel Simon
    Kalainathan, S.
    Kumar, A. Ruban
    SUPERLATTICES AND MICROSTRUCTURES, 2015, 88 : 116 - 126
12345