First-Order Reversal Curves of the Magnetostructural Transition in FeTe

Published

June 5, 2017

Author(s)

M. K. Frampton, J. Crocker, Dustin A. Gilbert, N. Curro, Kai Liu, J. A. Schneeloch, G. D. Gu, R. J. Zieve

Abstract

We apply the first-order reversal curve (FORC) method, borrowed from studies of ferromagnetic materials, to the magneto-structural phase transition of Fe_1+yTe. FORC measurements reveal two features in the hysteretic phase transition, even in samples where traditional temperature measurements display only a single transition. For Fe_{1.13Te, the influence of magnetic field suggests that main feature is primarily structural while a smaller, slightly higher-temperature transition is magnetic in origin. By contrast Fe}d1.03^Te, the influence of magnetic field suggests that main feature is primarily structural while a smaller, slightly higher-temperature transition is magnetic in origin. By contrast Fe_1.03Te has a single transition which shows a uniform response to magnetic field, indicating a stronger coupling of the magnetic and structural phase transitions. We also introduce uniaxial stress, which spreads the distribution width without changing the underlying energy barrier of the transformation. The work shows how FORC can help disentangle the roles of the magnetic and structural phase transitions in FeTe.

Citation

Physical Review B

Volume

95

Issue

21

Pub Type

Journals

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Keywords

phase transition, magnetic phase transition, characterization techniques, superconductivity

Citation

Frampton, M. , Crocker, J. , Gilbert, D. , Curro, N. , Liu, K. , Schneeloch, J. , Gu, G. and Zieve, R. (2017), First-Order Reversal Curves of the Magnetostructural Transition in FeTe, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=922120 (Accessed May 2, 2024)