Microscopic magnetic nature of K2NiF4-type 3d transition metal oxides

In order to elucidate the magnetic nature of K2NiF4-type 3d transition metal oxides, we have measured μ+SR spectra for Sr2VO4, LaSrVO4, and Sr2CrO4 using powder samples. ZF- and wTF-μ+SR measurements propose that Sr2VO4 enters into the static antiferromagnetic (AF) order phase below 8 K. In addition...

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Main Authors: Sugiyama, J, Nozaki, H, Umegaki, I, Higemoto, W, Ansaldo, E J, Brewer, J H, Sakurai, H, T-H Kao, H-D, Yang, Månsson, M
Format: Conference Proceeding
Language:English
Subjects:
Antiferromagnetism
Long range order
Magnetic moments
Metal oxides
Physics
Transition metal oxides
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Summary:In order to elucidate the magnetic nature of K2NiF4-type 3d transition metal oxides, we have measured μ+SR spectra for Sr2VO4, LaSrVO4, and Sr2CrO4 using powder samples. ZF- and wTF-μ+SR measurements propose that Sr2VO4 enters into the static antiferromagnetic (AF) order phase below 8 K. In addition, TF-μ+SR measurements evidence that the transition at 105 K is not magnetic but structural and/or electronic in origin. For LaSrVO4, static long-range order has not been observed down to 20 K, while, as T decreases from 145 K, wTF asymmetry starts to decrease below 60 K, suggesting the appearance and evolution of localized magnetic moments below 60 K. For Sr2CrO4, by contrast, both ZF- and wTF-μ+SR have confirmed the presence of antiferromagnetic order below 117 K, as predicted in the χ(T) curve.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/551/1/012011