Magnetostriction of First and Second Order Magnetite Samples and its Relation to the Magnetic Easy Axis Switching

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Magnetic field (up to 8T) and temperature (10-300K) dependence of size of Zn doped magnetite samples Fe3-xZnxO4 (x=0.008, 0.022, i.e. falling within first and second order Verwey transition regime) were measured by the strain gauge method. Both samples experienced shrinking on cooling through the Verwey transition along monoclinic c axis, while the strong expansion was found for the 1st order sample in the a-b direction, unlike in the 2nd order sample. Magnetostriction of both samples is very small and limited to low fields only, concomitant with magnetization process. However, field application perpendicular to c axis and at T slightly below the Verwey transition temperature TV results in a large change of dimensions, coinciding with the axis switching process.

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Periodical:

Solid State Phenomena (Volume 194)

Edited by:

Yuriy Verbovytskyy and António Pereira Gonçalves

Pages:

120-123

Citation:

A. Britwum et al., "Magnetostriction of First and Second Order Magnetite Samples and its Relation to the Magnetic Easy Axis Switching", Solid State Phenomena, Vol. 194, pp. 120-123, 2013

Online since:

November 2012

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$38.00

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