Thermomagnetic history effects in SmMn${}_2$Ge${}_2$

Abstract

The intermetallic compound SmMn${}_2$Ge${}_2$, displaying multiple magnetic phase transitions, is being investigated in detail for its magnetization behavior near the 145 K first order ferromagnetic to antiferromagnetic transition occuring on cooling, in particular for thermomagnetic history effects in the magnetization data. The most unusual finding is that the thermomagnetic irreversibility, [= M${}^{FCW}$(T)-M${}^{ZFC}$(T)] at 135 K is higher in intermediate magnetic field strengths. By studying the response of the sample (i.e., thermomagnetic irreversibility and thermal hysteresis) to different histories of application of magnetic field and temperature, we demonstrate how the supercooling and superheating of the metastable magnetic phases across the first order transition at 145 K contribute to overall thermomagnetic irreversibility.

15 pages, 5 figures, to appear in Physical Review B

References in corpus (2)

• First order transition from antiferromagnetism to ferromagnetism in Ce(Fe${}_{0.96}$Al${}_{0.04}{)}_2$
• First order transition from ferromagnetism to antiferromagnetism in Ce(Fe${}_{0.96}$Al${}_{0.04}$)${}_2$: a magnetotransport study

Cited by in corpus (4)

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• Magnetic, magneto-thermal and magneto-transport properties in SmMn2Si2-xGex compounds
• Ferromagnetic feature from Mn near room temperature in the fine particles of GdMn2Ge2 and TbMn2Ge2