Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4

Abstract CuAl2O4 is a ternary oxide spinel with Cu2+ ions ( $$s=1/2$$ s = 1 / 2 ) primarily populating the A-site diamond sublattice. The compound is reported to display evidence of spin glass behavior but possess a non-frozen magnetic ground state below the transition temperature. On the other hand...

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Autores principales:	T. J. Bullard, M. A. Susner, K. M. Taddei, J. A. Brant, T. J. Haugan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a433b15ed7fa4c11ac234d90f3664f8c
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spelling	oai:doaj.org-article:a433b15ed7fa4c11ac234d90f3664f8c2021-12-02T15:02:49ZMagnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO410.1038/s41598-021-89197-12045-2322https://doaj.org/article/a433b15ed7fa4c11ac234d90f3664f8c2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89197-1https://doaj.org/toc/2045-2322Abstract CuAl2O4 is a ternary oxide spinel with Cu2+ ions ( $$s=1/2$$ s = 1 / 2 ) primarily populating the A-site diamond sublattice. The compound is reported to display evidence of spin glass behavior but possess a non-frozen magnetic ground state below the transition temperature. On the other hand, the spinel CuGa2O4 displays spin glass behavior at ~ 2.5 K with Cu2+ ions more readily tending to the B-site pyrochlore sublattice. Therefore, we investigate the magnetic and structural properties of the solid solution CuAl2(1-x)Ga2xO4 examining the evolution of the magnetic behavior as Al3+ is replaced with a much larger Ga3+ ion. Our results show that the Cu2+ ions tend to migrate from tetrahedral to octahedral sites as the Ga3+ ion concentration increases, resulting in a concomitant change in the glassy magnetic properties of the solution. Results indicate glassy behavior for much of the solution with a general trend towards decreasing magnetic frustration as the Cu2+ ion shifts to the B-site. However, the $$x=0.1$$ x = 0.1 and 0.2 members of the system do not show glassy behavior down to our measurement limit (1.9 K) suggesting a delayed spin glass transition. We suggest that these two members are additional candidates for investigation to access highly frustrated exotic quantum states.T. J. BullardM. A. SusnerK. M. TaddeiJ. A. BrantT. J. HauganNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. J. Bullard M. A. Susner K. M. Taddei J. A. Brant T. J. Haugan Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
description	Abstract CuAl2O4 is a ternary oxide spinel with Cu2+ ions ( $$s=1/2$$ s = 1 / 2 ) primarily populating the A-site diamond sublattice. The compound is reported to display evidence of spin glass behavior but possess a non-frozen magnetic ground state below the transition temperature. On the other hand, the spinel CuGa2O4 displays spin glass behavior at ~ 2.5 K with Cu2+ ions more readily tending to the B-site pyrochlore sublattice. Therefore, we investigate the magnetic and structural properties of the solid solution CuAl2(1-x)Ga2xO4 examining the evolution of the magnetic behavior as Al3+ is replaced with a much larger Ga3+ ion. Our results show that the Cu2+ ions tend to migrate from tetrahedral to octahedral sites as the Ga3+ ion concentration increases, resulting in a concomitant change in the glassy magnetic properties of the solution. Results indicate glassy behavior for much of the solution with a general trend towards decreasing magnetic frustration as the Cu2+ ion shifts to the B-site. However, the $$x=0.1$$ x = 0.1 and 0.2 members of the system do not show glassy behavior down to our measurement limit (1.9 K) suggesting a delayed spin glass transition. We suggest that these two members are additional candidates for investigation to access highly frustrated exotic quantum states.
format	article
author	T. J. Bullard M. A. Susner K. M. Taddei J. A. Brant T. J. Haugan
author_facet	T. J. Bullard M. A. Susner K. M. Taddei J. A. Brant T. J. Haugan
author_sort	T. J. Bullard
title	Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
title_short	Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
title_full	Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
title_fullStr	Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
title_full_unstemmed	Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4
title_sort	magnetic and structural properties of the solid solution cual2(1−x)ga2xo4
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a433b15ed7fa4c11ac234d90f3664f8c
work_keys_str_mv	AT tjbullard magneticandstructuralpropertiesofthesolidsolutioncual21xga2xo4 AT masusner magneticandstructuralpropertiesofthesolidsolutioncual21xga2xo4 AT kmtaddei magneticandstructuralpropertiesofthesolidsolutioncual21xga2xo4 AT jabrant magneticandstructuralpropertiesofthesolidsolutioncual21xga2xo4 AT tjhaugan magneticandstructuralpropertiesofthesolidsolutioncual21xga2xo4
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Magnetic and structural properties of the solid solution CuAl2(1−x)Ga2xO4

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