A Samariya

A Sharma

C Van Komen

CB Fitzgerald

CER Torres

Eronides F da Silva

G Kresse

H Kimura

Horacio W Leite Alves

J Hays

JJ Beltran

JMD Coey

JP Perdew

LC Sánchez

Lucy V C Assali

Luisa M R Scolfaro

M Batzill

NH Hong

Pablo D Borges

PD Borges

RK Singhal

SB Ogale

SK Misra

VL Moruzzi

W Chen

W Wang

X Mathew

XF Liu

XY Cui

Z Xue-Yun

Nanoscale Research Letters

Abstract
          Transition-metal (TM)-doped diluted magnetic oxides (DMOs) have attracted attention from both experimental and theoretical points of view due to their potential use in spintronics towards new nanostructured devices and new technologies. In the present work, we study the magnetic properties of Sn0.96TM0.04O2 and Sn0.96TM0.04O1.98(V
            O)0.02, where TM = Fe and Co, focusing in particular in the role played by the presence of O vacancies nearby the TM. The calculated total energy as a function of the total magnetic moment per cell shows a magnetic metastability, corresponding to a ground state, respectively, with 2 and 1 μB/cell, for Fe and Co. Two metastable states, with 0 and 4 μB/cell were found for Fe, and a single value, 3 μB/cell, for Co. The spin-crossover energies (E
            S) were calculated. The values are E
            S
            0/2 = 107 meV and E
            S
            4/2 = 25 meV for Fe. For Co, E
            S
            3/1 = 36 meV. By creating O vacancies close to the TM site, we show that the metastablity and E
            S change. For iron, a new state appears, and the state with zero magnetic moment disappears. The ground state is 4 μB/cell instead of 2 μB/cell, and the energy E
            S
            2/4 is 30 meV. For cobalt, the ground state is then found with 3 μB/cell and the metastable state with 1 μB/cell. The spin-crossover energy E
            S
            1/3 is 21 meV. Our results suggest that these materials may be used in devices for spintronic applications that require different magnetization states.</jats:p

Crossref

Study of the oxygen vacancy influence on magnetic properties of Fe- and Co-doped SnO2 diluted alloys

https://nanoscalereslett.springeropen.com/track/pdf/10.1186/1556-276X-7-540?site=nanoscalereslett.springeropen.com

Study of the oxygen vacancy influence on magnetic properties of Fe- and Co-doped SnO2 diluted alloys

Abstract

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