2001/07/27 by R. Mahendiran, C. Martin, Mahendiran, R. +15
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0107560
10 pages, 5 figures, submitted to Phys. Rev. B
arxiv created 2001/07/27 · arxiv updated 2009/11/30
We investigated magnetic, magnetotransport and magnetostriction properties of the A-type antiferromagnet Pr0.46Sr0.54MnO3 which undergoes a first order paramagnetic-antiferromagnetic transition below TN = 210 K while cooling and TN = 215 K while warming. The zero field (μ0H = 0 T) resistivity shows a sudden jump at TN and a small bump around Tmax = 220 K (\TEXTsymbol> TN). TN shifts down and Tmax shifts up with increasing μ0H. Magnetoresistance as high as -45-57 % at 7 T is found in the temperature range 180 K-230 K. Isothermal measurements indicate that the field induced antiferromagnetic to ferromagnetic transition below TN is accompanied by a rapid decrease of the resistivity but increase of volume (ΔV/V = +0.25 % at 180 K and 13.7 T). This lattice coupled magnetoresistance transition is suggested due to the field induced structural transition from the low volume orthorhombic to the high volume tetragonal structure.