Distinctive exchange bias and unusual memory effects in magnetically compensated Pr0.75Gd0.25ScGe

Del Rose, Tyler; Pathak, Arjun K.; Mudryk, Yaroslav; Pecharsky, Vitalij K.

doi:10.1039/D0TC05087C

Distinctive exchange bias and unusual memory effects in magnetically compensated Pr_0.75Gd_0.25ScGe

Journal Article · Thu Nov 26 23:00:00 EST 2020 · Journal of Materials Chemistry C

DOI:https://doi.org/10.1039/D0TC05087C· OSTI ID:1724435

^[1]; Pathak, Arjun K. ^[1]; ^[2]; Pecharsky, Vitalij K. ^[1]

The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, USA
Department of Materials Science and Engineering, Iowa State University, Ames, USA

Tuning the chemistry of materials often leads to discoveries of interesting phenomena that expand basic science and support practical applications. Here we show how different spin–orbit coupling in light and heavy lanthanides can be exploited to create complex magnetic ground states and thereby unusual spontaneous exchange bias (SEB), conventional exchange bias (CEB), and magnetic memory effects in almost ideally magnetically compensated Pr_0.75Gd_0.25ScGe, which is a representative of the PrScGe–GdScGe solid solution. We report the synthesis and detailed characterization of Pr_0.75Gd_0.25ScGe by X-ray powder diffraction, scanning electron microscopy, and magnetization measurements in magnetic fields up to 140 kOe. Partial substitution of a light lanthanide, Pr, with a heavy lanthanide, Gd, results in a complex magnetic ground state, which includes large spontaneous and conventional exchange biases reaching magnitudes of ~1.7 kOe and ~3.5 kOe, respectively, at T = 2 K, as well as shape dependent magnetic compensation and bias phenomena occurring in small external fields.

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Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1724435

Alternate ID(s):: OSTI ID: 1727434

Journal Information:: Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 1 Vol. 9; ISSN JMCCCX; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Distinctive exchange bias and unusual memory effects in magnetically compensated Pr_0.75Gd_0.25ScGe