### Session Y9: Focus Session: Complex Bulk Oxide: Orbital Physics

8:00 AM–11:00 AM, Friday, March 2, 2012
Room: 209

Sponsoring Units: DMP GMAG
Chair: David Vanderbilt, Rutgers University

Abstract ID: BAPS.2012.MAR.Y9.2

### Abstract: Y9.00002 : Chemical pressure effects on structural, magnetic, and transport properties of Mn$_{1-x}$Co$_{x}$V$_{2}$O$_{4}$

8:12 AM–8:24 AM

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#### Authors:

Andhika Kiswandhi
(National High Magnetic Field Laboratory)

James Brooks
(National High Magnetic Field Laboratory)

Jun Lu
(National High Magnetic Field Laboratory)

Jeffrey Whalen
(National High Magnetic Field Laboratory)

Theo Siegrist
(National High Magnetic Field Laboratory)

Haidong Zhou
(National High Magnetic Field Laboratory)

The low-temperature x-ray diffraction, susceptibility, specific heat, and resistivity of the single crystal Mn$_{1-x}$Co$_x$V$_2$O$_{4}$ have been investigated. With increasing Co-doping, the chemical pressure related to the decreasing V-V distance drives the system towards the itinerant electron limit, accompanied with the increase of the ferrimagnetic transition temperature and the suppression of the structural distortion. These effects are compared to the effects from the application of physical pressure, and show that the V-V distance is the critical parameter controlling the properties of AV$_2$O$_4$.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.Y9.2