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17 January 2025

» arxiv » cond-mat/0701232

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Bulk ferromagnetism and large changes in photoluminescence intensity by magnetic field in $eta$-Ga$_2$O$_3$
V. Sridharan ; Sangam Banerjee ; Manas Sardar ; Sandip Dhara ; N. Gayathri ; V. S. Sastry ;
Date:	11 Jan 2007
Subject:	Materials Science
Abstract:	In this letter we report observation of room temperature ferromagnetism in bulk Ga$_2$O$_3$ . We also observe large (10-60%) increase/decrease in photoluminescence. In the red(700 nm wavelength)/blue(500 nm), with the application of small magnetic field(0.4 Tesla). We argue, that ferromagnetism occurs entirely due to chains of oxygen(O(3) sites, Fig. 5) vacancies. We propose a simple model to explain, origin and location of moment, formation of ferromagnetic dislocation needles, and strong increase/decrease ofred/blue photoluminescence intensity with magnetic field.
Source:	arXiv, cond-mat/0701232
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