Magnetic properties, microstructures and magnetoresistance effect in Co/Alq3 granular films

X. M. Zhao; G. Ni; Q. Shu; P. Sheng; J. Q. Wu; J. F. Yin; B. Ma; Q. Y. Jin

doi:10.1016/j.jmmm.2008.09.035

Magnetic properties, microstructures and magnetoresistance effect in Co/Alq₃ granular films

X. M. Zhao, G. Ni, Q. Shu, P. Sheng, J. Q. Wu, J. F. Yin, B. Ma, Q. Y. Jin

Electrical and Computer Engineering

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

3 Scopus citations

Abstract

A series of Co_x(Alq₃)_1-x granular films were prepared using the co-evaporating technique. HRTEM images show typical characteristics of granular films with the average size of 2-5 nm. It shows a gradual change from superparamagnetism to ferromagnetism with the rise of x. Negative magnetoresistance (MR) was observed, reaching -5.31% in x=0.44 sample at 30 K under the field of 10 kOe. The concentration dependence of MR and resistivity is also investigated. The inter-particle tunneling is believed to account for the negative MR effect.

Original language	English (US)
Pages (from-to)	418-422
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	321
Issue number	5
DOIs	https://doi.org/10.1016/j.jmmm.2008.09.035
State	Published - Mar 2009

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China under Grant 60501002.

Keywords

Granular film
Magnetoresistance
Organic semiconductor

Publisher link

10.1016/j.jmmm.2008.09.035

Find It

Find It at U of M Libraries

Cite this

@article{ed7feb9312aa404886c5b9dc54c08aa0,

title = "Magnetic properties, microstructures and magnetoresistance effect in Co/Alq3 granular films",

abstract = "A series of Cox(Alq3)1-x granular films were prepared using the co-evaporating technique. HRTEM images show typical characteristics of granular films with the average size of 2-5 nm. It shows a gradual change from superparamagnetism to ferromagnetism with the rise of x. Negative magnetoresistance (MR) was observed, reaching -5.31% in x=0.44 sample at 30 K under the field of 10 kOe. The concentration dependence of MR and resistivity is also investigated. The inter-particle tunneling is believed to account for the negative MR effect.",

keywords = "Granular film, Magnetoresistance, Organic semiconductor",

author = "Zhao, {X. M.} and G. Ni and Q. Shu and P. Sheng and Wu, {J. Q.} and Yin, {J. F.} and B. Ma and Jin, {Q. Y.}",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China under Grant 60501002.",

year = "2009",

month = mar,

doi = "10.1016/j.jmmm.2008.09.035",

language = "English (US)",

volume = "321",

pages = "418--422",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "5",

}

TY - JOUR

T1 - Magnetic properties, microstructures and magnetoresistance effect in Co/Alq3 granular films

AU - Zhao, X. M.

AU - Ni, G.

AU - Shu, Q.

AU - Sheng, P.

AU - Wu, J. Q.

AU - Yin, J. F.

AU - Ma, B.

AU - Jin, Q. Y.

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China under Grant 60501002.

PY - 2009/3

Y1 - 2009/3

N2 - A series of Cox(Alq3)1-x granular films were prepared using the co-evaporating technique. HRTEM images show typical characteristics of granular films with the average size of 2-5 nm. It shows a gradual change from superparamagnetism to ferromagnetism with the rise of x. Negative magnetoresistance (MR) was observed, reaching -5.31% in x=0.44 sample at 30 K under the field of 10 kOe. The concentration dependence of MR and resistivity is also investigated. The inter-particle tunneling is believed to account for the negative MR effect.

AB - A series of Cox(Alq3)1-x granular films were prepared using the co-evaporating technique. HRTEM images show typical characteristics of granular films with the average size of 2-5 nm. It shows a gradual change from superparamagnetism to ferromagnetism with the rise of x. Negative magnetoresistance (MR) was observed, reaching -5.31% in x=0.44 sample at 30 K under the field of 10 kOe. The concentration dependence of MR and resistivity is also investigated. The inter-particle tunneling is believed to account for the negative MR effect.

KW - Granular film

KW - Magnetoresistance

KW - Organic semiconductor

UR - http://www.scopus.com/inward/record.url?scp=56449112635&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56449112635&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2008.09.035

DO - 10.1016/j.jmmm.2008.09.035

M3 - Article

AN - SCOPUS:56449112635

SN - 0304-8853

VL - 321

SP - 418

EP - 422

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 5

ER -