Collapse of a Charge-Ordered State under a Magnetic Field in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>Pr</mi></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>Sr</mi></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>MnO</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>

Y. Tomioka; A. Asamitsu; Y. Moritomo; H. Kuwahara; Y. Tokura

doi:10.1103/PhysRevLett.74.5108

Collapse of a Charge-Ordered State under a Magnetic Field in $\Pr_{1 / 2} {Sr}_{1 / 2} {MnO}_{3}$

Y. Tomioka, A. Asamitsu, Y. Moritomo, H. Kuwahara, and Y. Tokura

Phys. Rev. Lett. 74, 5108 – Published 19 June 1995

Abstract

The perovskite-type manganese oxide, $\Pr_{1 - x} {Sr}_{x} {MnO}_{3}$ $(x = 0.5)$ , shows a first-order phase transition from a ferromagnetic (FM) metal to antiferromagnetic (AFM) nonmetal at 140 K, which accompanies the transition to the charge-ordered state (generalized Wigner lattice). The nonmetal-to-metal transition temperature can be decreased down to near 0 K with a magnetic field up to 70 kOe. The temperature-field phase diagram for the charge-ordered state is presented together with a discussion on the mechanism of this field-induced phase transition.

Received 13 February 1995

DOI:https://doi.org/10.1103/PhysRevLett.74.5108

Authors & Affiliations

Y. Tomioka¹, A. Asamitsu¹, Y. Moritomo¹, H. Kuwahara¹, and Y. Tokura^1,2

¹Joint Research Center for Atom Technology, (JRCAT), 1-1-4 Higashi, Tsukuba 305, Japan
²Department of Physics, University of Tokyo, Hongo Bunkyo-ku, Tokyo 113, Japan