Temperature and field induced strain measurements in single crystal Gd5Si2Ge2

McCall, S. K.; Nersessian, N.; Carman, G. P.; Pecharsky, V. K.; Schlagel, D. L.; Radousky, H. B.

doi:10.1007/s11837-016-1895-0

Title: Temperature and field induced strain measurements in single crystal Gd₅Si₂Ge₂

Journal Article · Tue Mar 29 00:00:00 EDT 2016 · JOM. Journal of the Minerals, Metals & Materials Society

DOI:https://doi.org/10.1007/s11837-016-1895-0· OSTI ID:1266676

^[1]; Nersessian, N. ^[2]; Carman, G. P. ^[3]; Pecharsky, V. K. ^[4]; Schlagel, D. L. ^[5]; Radousky, H. B. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Los Angeles, CA (United States)
Univ. of California, Los Angeles, CA (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab., Ames, IA (United States)

The first-order magneto-structural transformation that occurs in Gd₅Si₂Ge₂ near room temperature makes it a strong candidate for many energy harvesting applications. Understanding the single crystal properties is crucial for allowing simulations of device performance. In this study, magnetically and thermally induced transformation strains were measured in a single crystal of Gd₅Si_2.05Ge_1.95 as it transforms from a high-temperature monoclinic paramagnet to a lower-temperature orthorhombic ferromagnet. Thermally induced transformation strains of –8500 ppm, +960 ppm and +1800 ppm, and magnetically induced transformation strains of –8500 ppm, +900 ppm and +2300 ppm were measured along the a, b and c axes, respectively. Furthermore, using experimental data coupled with general thermodynamic considerations, a universal phase diagram was constructed showing the transition from the monoclinic to the orthorhombic phase as a function of temperature and magnetic field.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1266676

Report Number(s):: LLNL-JRNL-663037; PII: 1895

Journal Information:: JOM. Journal of the Minerals, Metals & Materials Society, Vol. 68, Issue 6; ISSN 1047-4838

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (19)

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