Magnetic-field induced ferromagnetism as the origin for the colossal magneto-resistance in La1.2 Sr1.8 Mn2 O7

Y. Shiotani; J. S. Gardner; J. L. Sarrao; Guo qing Zheng

doi:10.1016/j.jmmm.2006.10.914

Magnetic-field induced ferromagnetism as the origin for the colossal magneto-resistance in La_1.2 Sr_1.8 Mn₂ O₇

Y. Shiotani, J. S. Gardner, J. L. Sarrao, Guo qing Zheng

Research output: Contribution to journal › Article › peer-review

Abstract

We present a ¹³⁹La NMR study on the colossal magneto-resistance (CMR) in double-layered manganese oxide La_1.2 Sr_1.8 Mn₂ O₇. Above the Curie temperature T_C = 126 K, applying a magnetic field is found to induce a ferromagnetic order that persists up to T = 330 K. The critical field at which the induced magnetic moment is saturated agrees well with the field at which the CMR effect reaches to a maximum. Our results indicate that the CMR observed above T_C is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.

Original language	English
Pages (from-to)	e661-e663
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.914
State	Published - Mar 2007
Externally published	Yes

Keywords

CMR
Manganese oxide
NMR

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10.1016/j.jmmm.2006.10.914

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title = "Magnetic-field induced ferromagnetism as the origin for the colossal magneto-resistance in La1.2 Sr1.8 Mn2 O7",

abstract = "We present a 139La NMR study on the colossal magneto-resistance (CMR) in double-layered manganese oxide La1.2 Sr1.8 Mn2 O7. Above the Curie temperature TC = 126 K, applying a magnetic field is found to induce a ferromagnetic order that persists up to T = 330 K. The critical field at which the induced magnetic moment is saturated agrees well with the field at which the CMR effect reaches to a maximum. Our results indicate that the CMR observed above TC is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.",

keywords = "CMR, Manganese oxide, NMR",

author = "Y. Shiotani and Gardner, {J. S.} and Sarrao, {J. L.} and Zheng, {Guo qing}",

year = "2007",

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T1 - Magnetic-field induced ferromagnetism as the origin for the colossal magneto-resistance in La1.2 Sr1.8 Mn2 O7

AU - Shiotani, Y.

AU - Gardner, J. S.

AU - Sarrao, J. L.

AU - Zheng, Guo qing

PY - 2007/3

Y1 - 2007/3

N2 - We present a 139La NMR study on the colossal magneto-resistance (CMR) in double-layered manganese oxide La1.2 Sr1.8 Mn2 O7. Above the Curie temperature TC = 126 K, applying a magnetic field is found to induce a ferromagnetic order that persists up to T = 330 K. The critical field at which the induced magnetic moment is saturated agrees well with the field at which the CMR effect reaches to a maximum. Our results indicate that the CMR observed above TC is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.

AB - We present a 139La NMR study on the colossal magneto-resistance (CMR) in double-layered manganese oxide La1.2 Sr1.8 Mn2 O7. Above the Curie temperature TC = 126 K, applying a magnetic field is found to induce a ferromagnetic order that persists up to T = 330 K. The critical field at which the induced magnetic moment is saturated agrees well with the field at which the CMR effect reaches to a maximum. Our results indicate that the CMR observed above TC is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.

KW - CMR

KW - Manganese oxide

KW - NMR

UR - http://www.scopus.com/inward/record.url?scp=33847684241&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2006.10.914

DO - 10.1016/j.jmmm.2006.10.914

M3 - Article

AN - SCOPUS:33847684241

SN - 0304-8853

VL - 310

SP - e661-e663

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 3

ER -

Magnetic-field induced ferromagnetism as the origin for the colossal magneto-resistance in La_1.2 Sr_1.8 Mn₂ O₇

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Keywords

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