Field-induced magnetostructural transition in Gd5 Ge4 studied by pulsed magnetic fields

Z. W. Ouyang; H. Nojiri; Shunsuke Yoshii; G. H. Rao; Y. C. Wang; V. K. Pecharsky; K. A. Gschneidner

doi:10.1103/PhysRevB.77.184426

Field-induced magnetostructural transition in Gd5 Ge4 studied by pulsed magnetic fields

Z. W. Ouyang, H. Nojiri, Shunsuke Yoshii, G. H. Rao, Y. C. Wang, V. K. Pecharsky, K. A. Gschneidner

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The field-induced magnetostructural transformation in Gd5 Ge4 was examined by magnetization measurements in pulsed magnetic fields. The low-temperature irreversibility of the transition can be destroyed by the magnetocaloric effect, and depending on the heat exchange between the sample and its surroundings, the irreversibility (or kinetic arrest) can also be retained. Measurements by using various magnetic-field sweep rates were conducted to examine the dynamic response of the system in the transition region. The critical fields for the magnetostructural transition below 20 K are field sweep rate dependent-the larger the field sweep rate, the higher the critical field. However, this rate dependence is readily suppressed with increasing temperature.

Original language	English
Article number	184426
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.77.184426
Publication status	Published - 2008 May 22

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "The field-induced magnetostructural transformation in Gd5 Ge4 was examined by magnetization measurements in pulsed magnetic fields. The low-temperature irreversibility of the transition can be destroyed by the magnetocaloric effect, and depending on the heat exchange between the sample and its surroundings, the irreversibility (or kinetic arrest) can also be retained. Measurements by using various magnetic-field sweep rates were conducted to examine the dynamic response of the system in the transition region. The critical fields for the magnetostructural transition below 20 K are field sweep rate dependent-the larger the field sweep rate, the higher the critical field. However, this rate dependence is readily suppressed with increasing temperature.",

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AU - Nojiri, H.

AU - Yoshii, Shunsuke

AU - Rao, G. H.

AU - Wang, Y. C.

AU - Pecharsky, V. K.

AU - Gschneidner, K. A.

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AB - The field-induced magnetostructural transformation in Gd5 Ge4 was examined by magnetization measurements in pulsed magnetic fields. The low-temperature irreversibility of the transition can be destroyed by the magnetocaloric effect, and depending on the heat exchange between the sample and its surroundings, the irreversibility (or kinetic arrest) can also be retained. Measurements by using various magnetic-field sweep rates were conducted to examine the dynamic response of the system in the transition region. The critical fields for the magnetostructural transition below 20 K are field sweep rate dependent-the larger the field sweep rate, the higher the critical field. However, this rate dependence is readily suppressed with increasing temperature.

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