Emergent 1/3 magnetization plateaus in pyroxene CoGeO3 - Kölner UniversitätsPublikationsServer

Guo, H., Zhao, L., Baenitz, M., Fabreges, X., Gukasov, A., Sans, A. Melendez, Khomskii, D., I, Tjeng, L. H. and Komarek, A. C. (2021). Emergent 1/3 magnetization plateaus in pyroxene CoGeO3. Phys. Rev. Res., 3 (3). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2643-1564

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DOI:10.1103/PhysRevResearch.3.L032037

Abstract

Despite the absence of an apparent triangular pattern in the crystal structure, we observe unusually well-pronounced 1/3 magnetization plateaus in the quasi-one-dimensional Ising spin chain compound CoGeO3 which belongs to the class of pyroxene minerals. We succeeded in uncovering the detailed microscopic spin structure of the 1/3 magnetization plateau phase by means of neutron diffraction. We observed changes of the initial antiferromagnetic zero-field spin structure that resemble a regular formation of antiferromagnetic domain wall boundaries, resulting in a kind of modulated magnetic structure with a 1/3-integer propagation vector. The net ferromagnetic moment emerges at these domain walls whereas two thirds of all antiferromagnetic chain alignments can be still preserved. We propose a microscopic model on the basis of an anisotropic frustrated square lattice to explain the observations.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Guo, H.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Zhao, L.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Baenitz, M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Fabreges, X.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Gukasov, A.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Sans, A. Melendez	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Khomskii, D., I	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Tjeng, L. H.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Komarek, A. C.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED