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Magnetic properties of tapiolite (FeTa(2)0(6)); a quasi two-dimensional (2D) antiferromagnet
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UNSPECIFIED (2004) Magnetic properties of tapiolite (FeTa(2)0(6)); a quasi two-dimensional (2D) antiferromagnet. JOURNAL OF PHYSICS-CONDENSED MATTER, 16 (43). pp. 7837-7852. doi:10.1088/0953-8984/16/43/023
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Official URL: http://dx.doi.org/10.1088/0953-8984/16/43/023
Abstract
The possibilities of two-dimensional (2D) short-range magnetic correlations and frustration effects in the mineral tapiolite are investigated using bulk-property measurements and neutron Laue diffraction. In this study of the magnetic properties of synthetic single-crystals of tapiolite, we find that single crystals of FeTa2O6 order antiferromagnetically at T-N = 7.95 +/- 0.05 K, with extensive two-dimensional correlations existing up to at least 40 K. Although we find no evidence that FeTa2O6 is magnetically frustrated, hallmarks of two-dimensional magnetism observed in our single-crystal data include: (i) broadening of the susceptibility maximum due to short-range correlations, (ii) a spin-flop transition and (iii) lambda anomalies in the heat capacity and d(chiT)/dT. Complementary neutron Laue diffraction measurements reveal ID magnetic diffuse scattering extending along the c* direction perpendicular to the magnetic planes. This magnetic diffuse scattering, observed for the first time using the neutron Laue technique by VIVALDI,. arises directly as a result of 2D short-range spin correlations.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Journal or Publication Title: | JOURNAL OF PHYSICS-CONDENSED MATTER | ||||
| Publisher: | IOP PUBLISHING LTD | ||||
| ISSN: | 0953-8984 | ||||
| Official Date: | 3 November 2004 | ||||
| Dates: |
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| Volume: | 16 | ||||
| Number: | 43 | ||||
| Number of Pages: | 16 | ||||
| Page Range: | pp. 7837-7852 | ||||
| DOI: | 10.1088/0953-8984/16/43/023 | ||||
| Publication Status: | Published |
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