Magnetic correlations in mixed valent layered La1.2Sr0.8CoO4

A. Ahad; K. Gautam; S. S. Majid; K. Dey; F. Rahman; R. J. Choudhary; D. K. Shukla

doi:10.1016/j.physb.2019.06.050

Magnetic correlations in mixed valent layered La_1.2Sr_0.8CoO₄

A. Ahad^*
, K. Gautam
, S. S. Majid
, K. Dey
, F. Rahman
, R. J. Choudhary
, D. K. Shukla

^*Corresponding author for this work

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

5 Scopus citations

Abstract

We present here investigations on a hole doped layered perovskite, La_1.2Sr_0.8CoO₄. In these systems concentration of the holes in host matrix decides ratio of the Co²⁺/Co³⁺ and magnetic phase diagram. In addition, spin-state of the Co³⁺ ions has an important role in magnetic correlations. Magnetization measurements show the signature of some exotic phases like cluster glass or canonical spin-glass and ferromagnetic ordering (T_c ∼ 211 K). In addition, calculated temperature variation of order parameter by also including the spin-state variations of Co³⁺ manifests that the orbital magnetic moments are not quenched here and has an important role in overall magnetic moment at low temperatures.

Original language	English
Pages (from-to)	308-311
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	570
DOIs	https://doi.org/10.1016/j.physb.2019.06.050
State	Published - 1 Oct 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Anisotropy
Frustrated magnetism
Spin-states

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2019.06.050

Cite this

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title = "Magnetic correlations in mixed valent layered La1.2Sr0.8CoO4 ",

abstract = "We present here investigations on a hole doped layered perovskite, La1.2Sr0.8CoO4. In these systems concentration of the holes in host matrix decides ratio of the Co2+/Co3+ and magnetic phase diagram. In addition, spin-state of the Co3+ ions has an important role in magnetic correlations. Magnetization measurements show the signature of some exotic phases like cluster glass or canonical spin-glass and ferromagnetic ordering (Tc ∼ 211 K). In addition, calculated temperature variation of order parameter by also including the spin-state variations of Co3+ manifests that the orbital magnetic moments are not quenched here and has an important role in overall magnetic moment at low temperatures.",

keywords = "Anisotropy, Frustrated magnetism, Spin-states",

author = "A. Ahad and K. Gautam and Majid, \{S. S.\} and K. Dey and F. Rahman and Choudhary, \{R. J.\} and Shukla, \{D. K.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = oct,

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doi = "10.1016/j.physb.2019.06.050",

language = "English",

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TY - JOUR

T1 - Magnetic correlations in mixed valent layered La1.2Sr0.8CoO4

AU - Ahad, A.

AU - Gautam, K.

AU - Majid, S. S.

AU - Dey, K.

AU - Rahman, F.

AU - Choudhary, R. J.

AU - Shukla, D. K.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - We present here investigations on a hole doped layered perovskite, La1.2Sr0.8CoO4. In these systems concentration of the holes in host matrix decides ratio of the Co2+/Co3+ and magnetic phase diagram. In addition, spin-state of the Co3+ ions has an important role in magnetic correlations. Magnetization measurements show the signature of some exotic phases like cluster glass or canonical spin-glass and ferromagnetic ordering (Tc ∼ 211 K). In addition, calculated temperature variation of order parameter by also including the spin-state variations of Co3+ manifests that the orbital magnetic moments are not quenched here and has an important role in overall magnetic moment at low temperatures.

AB - We present here investigations on a hole doped layered perovskite, La1.2Sr0.8CoO4. In these systems concentration of the holes in host matrix decides ratio of the Co2+/Co3+ and magnetic phase diagram. In addition, spin-state of the Co3+ ions has an important role in magnetic correlations. Magnetization measurements show the signature of some exotic phases like cluster glass or canonical spin-glass and ferromagnetic ordering (Tc ∼ 211 K). In addition, calculated temperature variation of order parameter by also including the spin-state variations of Co3+ manifests that the orbital magnetic moments are not quenched here and has an important role in overall magnetic moment at low temperatures.

KW - Anisotropy

KW - Frustrated magnetism

KW - Spin-states

UR - https://www.scopus.com/pages/publications/85068175247

U2 - 10.1016/j.physb.2019.06.050

DO - 10.1016/j.physb.2019.06.050

M3 - Article

AN - SCOPUS:85068175247

SN - 0921-4526

VL - 570

SP - 308

EP - 311

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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