Layered antiferromagnetic state in (Nd1-zLaz)Sr2Mn2O7

Yutaka Moritomo; Arao Nakamura; Kenji Ohoyama; Masayoshi Ohashi; Kazuma Hirota

doi:10.1143/JPSJ.68.631

Layered antiferromagnetic state in (Nd_1-zLa_z)Sr₂Mn₂O₇

Yutaka Moritomo, Arao Nakamura, Kenji Ohoyama, Masayoshi Ohashi, Kazuma Hirota

Institute for Materials Research (IMR)

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

13 Citations (Scopus)

Abstract

Anisotropic magnetic and transport properties have been investigated for single crystals of (Nd_1-zLa_z)Sr₂Mn₂O₇. We have derived the magnetic phase diagram against the La concentration z and have found that the low-temperature state is of layered antiferromagnetic with alternating MnO₂-sheets. The reentrant-type charge-ordered state is observed in the limited z-region around z = 1.0 due to the released Jahn-Teller distortion. We further investigated magnetotransport properties for these antiferromagnetic manganites, and have found a large negative magnetoresistance, e.g., ρ_c(H)/ρ_c(0) ∼ 0.86 and ρ_ab(H)/ρ_ab(0) ∼ 0.88 at μ₀H = 1 T.

Original language	English
Pages (from-to)	631-636
Number of pages	6
Journal	journal of the physical society of japan
Volume	68
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.68.631
Publication status	Published - 1999 Feb

Keywords

Charge-ordering transition
Layered antiferromagnetic state
Layered manganites
Magnetoresistance

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "Anisotropic magnetic and transport properties have been investigated for single crystals of (Nd1-zLaz)Sr2Mn2O7. We have derived the magnetic phase diagram against the La concentration z and have found that the low-temperature state is of layered antiferromagnetic with alternating MnO2-sheets. The reentrant-type charge-ordered state is observed in the limited z-region around z = 1.0 due to the released Jahn-Teller distortion. We further investigated magnetotransport properties for these antiferromagnetic manganites, and have found a large negative magnetoresistance, e.g., ρc(H)/ρc(0) ∼ 0.86 and ρab(H)/ρab(0) ∼ 0.88 at μ0H = 1 T.",

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T1 - Layered antiferromagnetic state in (Nd1-zLaz)Sr2Mn2O7

AU - Moritomo, Yutaka

AU - Nakamura, Arao

AU - Ohoyama, Kenji

AU - Ohashi, Masayoshi

AU - Hirota, Kazuma

PY - 1999/2

Y1 - 1999/2

N2 - Anisotropic magnetic and transport properties have been investigated for single crystals of (Nd1-zLaz)Sr2Mn2O7. We have derived the magnetic phase diagram against the La concentration z and have found that the low-temperature state is of layered antiferromagnetic with alternating MnO2-sheets. The reentrant-type charge-ordered state is observed in the limited z-region around z = 1.0 due to the released Jahn-Teller distortion. We further investigated magnetotransport properties for these antiferromagnetic manganites, and have found a large negative magnetoresistance, e.g., ρc(H)/ρc(0) ∼ 0.86 and ρab(H)/ρab(0) ∼ 0.88 at μ0H = 1 T.

AB - Anisotropic magnetic and transport properties have been investigated for single crystals of (Nd1-zLaz)Sr2Mn2O7. We have derived the magnetic phase diagram against the La concentration z and have found that the low-temperature state is of layered antiferromagnetic with alternating MnO2-sheets. The reentrant-type charge-ordered state is observed in the limited z-region around z = 1.0 due to the released Jahn-Teller distortion. We further investigated magnetotransport properties for these antiferromagnetic manganites, and have found a large negative magnetoresistance, e.g., ρc(H)/ρc(0) ∼ 0.86 and ρab(H)/ρab(0) ∼ 0.88 at μ0H = 1 T.

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KW - Magnetoresistance

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