On the exchange bias effect in NiO nanoparticles with a core(antiferromagnetic)/shell (spin glass) morphology

被引：4

作者：

Rinaldi-Montes, N. ^{[1
]}

Gorria, P. ^{[1
]}

Martinez-Blanco, D. ^{[2
]}

Fuertes, A. B. ^{[3
]}

Fernandez Barquin, L. ^{[4
]}

Rodriguez Fernandez, J. ^{[4
]}

de Pedro, I. ^{[4
]}

Fdez-Gubieda, M. L. ^{[5
,6
]}

Alonso, J. ^{[5
,6
]}

Olivi, L. ^{[7
]}

Aquilanti, G. ^{[7
]}

Puente-Orench, I. ^{[8
,9
]}

Blanco, J. A. ^{[1
]}

机构：

[1] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

[2] Univ Oviedo, Serv Cient Tecn, E-33006 Oviedo, Spain

[3] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

[4] Univ Cantabria, Fac Ciencias, CITIMAC, E-39005 Santander, Spain

[5] Univ Basque Country, EHU, Dept Elect & Elect, E-48080 Bilbao, Spain

[6] BCMaterials, E-48080 Bilbao, Spain

[7] Sincrotrone Trieste SCpA, I-34149 Trieste, Italy

[8] Univ Zaragoza, Inst Ciencia Mat Aragon, CSIC, E-50009 Zaragoza, Spain

[9] Inst Laue Langevin, F-38042 Grenoble 9, France

来源：

7TH MEETING OF THE SPANISH NEUTRON SCATTERING ASSOCIATION (SETN) | 2015年 / 663卷

关键词：

D O I：

10.1088/1742-6596/663/1/012001

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The unexpected appearance of magnetic hysteresis and exchange bias effects in nominally antiferromagnetic NiO nanoparticles is usually explained in terms of a core/shell morphology, where a spin glass-like shell is exchange coupled to an antiferromagnetic core. However, recent studies have challenged the validity of this assumption for small enough NiO nanoparticles. In this work we present proof of the core/shell model for NiO nanoparticles with sizes below 10 nm by combining neutron powder diffraction and magnetic measurements. In addition, we have verified that the exchange bias effect persists even when the particle size is reduced down to 4 nm.

引用

页数：4

共 50 条

[1] Bridging exchange bias effect in NiO and Ni(core)@NiO(shell) nanoparticles
Rinaldi-Montes, Natalia
Gorria, Pedro
Martinez-Blanco, David
Fuertes, Antonio B.
Fernandez Barquin, Luis
Puente-Orench, Ines
Blanco, Jesus A.
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2016, 400 : 236 - 241
[2] Evidence of exchange bias effect originating from the interaction between antiferromagnetic core and spin glass shell
Zhang, X. K.
Tang, S. L.
Xu, L. Q.
Yuan, J. J.
Yu, H. J.
Zhu, X. R.
Xie, Y. M.
[J]. JOURNAL OF APPLIED PHYSICS, 2014, 116 (02)
[3] A Monte Carlo study of the exchange bias effects in magnetic nanoparticles with ferromagnetic core/antiferromagnetic shell morphology
Eftaxias, E.
Vasilakaki, M.
Trohidou, K. N.
[J]. MODERN PHYSICS LETTERS B, 2007, 21 (18): : 1169 - 1177
[4] Effect of cooling field strength and ferromagnetic shell shape on exchange bias in nanoparticles with inverted ferromagnetic-antiferromagnetic core-shell morphology
Hu, Yong
Liu, Yan
Du, An
[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2010, 247 (04): : 972 - 978
[5] Size-dependent exchange bias in ferromagnetic (core)/antiferromagnetic (shell) nanoparticles
Hu, Yong
Liu, Yan
Wu, Hai-Na
Du, An
Shi, Feng
[J]. PHYSICA B-CONDENSED MATTER, 2014, 449 : 214 - 219
[6] Dependence of exchange bias on core/shell relative dimension in ferromagnetic/antiferromagnetic nanoparticles
Hu, Yong
Liu, Yan
Du, An
Shi, Feng
[J]. PHYSICS LETTERS A, 2014, 378 (22-23) : 1667 - 1674
[7] Modeling of exchange bias in the antiferromagnetic (core)/ferromagnetic (shell) nanoparticles with specialized shapes
Hu, Yong
Liu, Yan
Du, An
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2011, 323 (21) : 2613 - 2621
[8] Monte Carlo study of the exchange bias and the training effect in nanoparticles with core/shell morphology
Vasilakaki, M.
Eftaxias, E.
Trohidou, K. N.
[J]. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2008, 205 (08): : 1865 - 1871
[9] Effect of Antiferromagnetic Anisotropy on Exchange Bias in a Single Composite Nanoparticle with Unconventional Antiferromagnetic-Ferromagnetic Core-Shell Morphology
Hu, Yong
Liu, Yan
Qi, Yan
Du, An
[J]. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY, 2011, 9 : 67 - 71
[10] Resultant exchange bias and coercivity on rotatable antiferromagnetic anisotropy in ellipsoidal core/shell nanoparticles
Hu, Yong
Wu, Guozhen
Liu, Yan
Du, An
[J]. PHYSICS LETTERS A, 2012, 376 (19) : 1650 - 1656

← 1 2 3 4 5 →