DC-magnetisation studies in the La1-xSrxCoO3 (x ≤ 0.4) system

Chaudhary, Sujeet ; Roy, S. B. ; Chaddah, P. (2001) DC-magnetisation studies in the La1-xSrxCoO3 (x ≤ 0.4) system Journal of Alloys and Compounds, 326 (1-2). pp. 112-116. ISSN 0925-8388

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0925-8388(01)01236-1

Abstract

The magnetic field and temperature dependence of DC-magnetisation in polycrystalline samples of La1-xSrxCoO3 (x≤0.4) (LSCO) perovskite system is being studied using a SQUID magnetometer. We find that for Sr-concentration, x≥0.2, a sharp increase in magnetisation is observed in the temperature regime of 200-230 K. Strong thermomagnetic irreversibility (i.e. MZFC≠MFC) in the entire investigated composition regime is found in this system. Furthermore, we observed a mild hysteresis and small coercivity in the M-H scans performed at various temperatures in samples with x≥0.2. The observed magnetic behaviour in these samples clearly indicates that for x≥0.2, LSCO is a soft ferromagnet. We interpret that the observed thermomagnetic irreversibility arises from large magnetocrystalline anisotropy, which at low external applied magnetic fields effectively pins the ferromagnetic (FM) domains.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:DC-magnetisation; Magnetocrystalline Anisotropy; Ferromagnet; LSCO
ID Code:84495
Deposited On:27 Feb 2012 13:10
Last Modified:27 Feb 2012 13:10

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