Results for “PrScGe”

DOE OSTI2020

Materials Data on PrScGe by Materials Project

PrScGe crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Pr is bonded in a 5-coordinate geometry to five equivalent Ge atoms. There are four shorter (3.20 Å) and one longer (3.26 Å) Pr–Ge bond lengths. Sc is bonded in a distorted square co-planar geometry to four equivalent Ge atoms. All Sc–Ge bond lengths are 2.93 Å. Ge is bonded in a 9-coordinate geometry to five equivalent Pr and four equivalent Sc atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Distinctive exchange bias and unusual memory effects in magnetically compensated Pr 0.75 Gd 0.25 ScGe

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 0.75 Gd 0.25 ScGe, which is a representative of the PrScGe–GdScGe solid solution. We report the synthesis and detailed characterization of Pr 0.75 Gd 0.25 ScGe 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.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗