J Materiomics 4(2018) ivvii

J Materiomics Vol 4, 2018

Graphical abstracts

REVIEW ARTILE Inclusion in Web of Science and Scopus

A brief review of ferroelectric control of magnetoresistance in organic spin valvesXiaoshan Xu

pp. 1–12

Ferroelectricity has been introduced to organic spin valves to manipulate the magneto transport, providing a knob to vary the interfacial energy alignment and the in-terfacial crystal structures, both are critical for the spin transport at the interface. In this review, we discuss the recent efforts of controlling magnetoresistance of organic spin valves using ferroelectricity, where the ferroelectric materials are either inserted as an interfacial layer or used as the spacer material. These efforts advance the understanding of the spin transport through the ferromag-net/organic interfaces and the results promise more func-tionality of organic spintronic devices.

REVIEW ARTILE Inclusion in Web of Science and Scopus

Requirements for the transfer of lead-free piezoceramics into applicationJurij Koruza, Andrew J. Bell, Till Fromling, Kyle G. Webber, Ke Wang and Jürgen Rödel*

pp.13–26

Following the discovery of high primary proper-ties, research of lead-free materials is now en-tering a second phase.

Transfer of lead-free piezoceramics into products requires the assessment of various application-relevant properties.

Most relevant are cost, reproducibility, mechan-ical and thermal properties, electrical conductiv-ity, and lifetime.

Succinct guidelines for future pertinent research requirements are summarized.

v Graphical abstracts / J Materiomics 4(2018) ivvii

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Ferroelectric domains and phase transition of sol-gel processed epitaxial Sm-doped BiFeO3 (001) thin filmsZhen Zhou, Wei Sun, Zhenyu Liao, Shuai Ning, Jing Zhu and Jing-Feng Li*

pp.27–34

The 12% Sm-doped BiFeO3 epitaxial thin films on Nb-doped SrTiO3 (001) substrate were prepared via a sol-gel method.

The in-situ ferroelectric domain evolution from room temperature to 200 °C was char-acterized by PFM.

A phase transition from ferroelectric to anti-ferroelectric phase was illustrated by SS-PFM.

A significant piezoelectric response was found at the phase boundary.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Dielectric relaxation of interfacial polarizable molecules in chitosan ice-hydrogel materi-alsY.Q. Li, C.X. Zhang, P. Jia, Y. Zhang, L. Lin, Z.B. Yan, X.H. Zhou and J.-M. Liu*

pp.35–43

In this work, we investigate the dielectric relaxation spectro-scopy of the chitosan ice-hydrogels, which demonstrates several novelties as highlighted below:

An experimental strategy to investigate the dielectric properties of chitosan ice-hydrogels has been developed.

The dielectric response of chitosan hydrogels below the water solidifying point (ice-hydrogels) has been measured so that the properties of the chitosan-water interfacial molecules can be partially probed.

The thermal activation energy for the relaxation of chitosan-ice interfacial polarizable molecules has been evaluated.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

High discharged energy density of polymer nanocomposites induced by Nd-doped Ba-TiO3 nanoparticlesJing Wang*, Juntao Hu, Lu Yang, Kongjun Zhu, Bao-Wen Li**, Qiaomei Sun, Yanxin Li and Jinhao Qiu

pp.44–50

Graphical abstracts / J Materiomics 4(2018) ivvii vi

Nd-doped BaTiO3 (NBT) particles were introduced into PVDF to increase the energy storage density.

The composite shows a discharged energy density of 12.5 J/cm3

with a small loading of 1 vol.% NBT. NBT/PVDF shows a comparable discharged energy density to the

composites filled with core-shell nanoparticles and nanofibers.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Correlation of structural and electrical properties of PrBaCo2O5 thin films at high tem-peratureBrennan Mace, Zach Harrell, Xing Xu, Chonglin Chen*, Erik Enriquez, Aiping Chen and Quanxi Jia

pp.51–55

Mechanical deformation of highly epitaxial PrBaCo2O5  thin films induced by order/disorder oxygen vacancy structures

Strong correlation of deformed structures and electrical properties of highly epitaxial PrBaCo2O5 thin films

Strong anisotropic thermal expansion behavior at high temperatures

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Structural evolution and reaction mechanism of lithium nickelate (LiNiO2) during the carbonation reactionDaniela González-Varela, Brenda Alcántar-Vázquez, Heriberto Pfeiffer

pp.56–61

CO2 chemisorption mechanism on LiNiO2 was evaluated CO2 chemisorption on LiNiO2 exhibited an atypical thermal

behavior in comparison to other alkaline ceramics LiNiO2 reacts with CO2 through a complex structural evol-

ution process, where lithium is partially released Lithium release produced the formation of different Li1-

xNi1+xO2 crystalline phases CO2 chemisorption results fitted to specific lithium coeffi-

cients of different lithium nickelate phases

400 450 500 550 600 650 700 750 800100

102

104

106

108

110

112

Temperature (°C)

Wei

ght (

%)

1.2

1.0

0.8

0.6

0.4

Li content (x) in L

ix NiO

2

LiNiO2

O

Li

Ni

2LiNiO2 + CO2 → Li1-xNi1+xO2 + Li2CO3 + 1-xNiO + O2

CO2 chemisorption and lithium content evolution on

LiNiO2 as a function of temperature

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Thermoelectric properties of In-Hg co-doping in SnTe: Energy band engineeringXiaofang Tan, Guoqiang Liu, Jingtao Xu*, Xiaojian Tan, Hezhu Shao, Haoyang Hu, Haochuan Jiang, Yalin Lu** and Jun Jiang

pp.62–67

vii Graphical abstracts / J Materiomics 4(2018) ivvii

We investigate the interplay between reson-ant level and band convergence in In-Hg co-doped SnTe.

An apparent competition effect between band convergence doping and resonant level doping is observed in our experiment.

The Seebeck coefficients of the co-doped samples have a great improvement (over 50 μVK−1) at room temperature.

A ZTmax ~ 0.9 at 850 K are achieved in Sn0.98Bi0.02Te-1% HgInTe2.

ORIGINAL RESEARCH ARTICLE Inclusion in Web of Science and Scopus

Thermoelectric properties of In-substituted Ge-based clathrates prepared by HPHTBinwu Liu, Hongan Ma*, Dexuan Huo, Haiqiang Liu, Baomin Liu, Jiaxiang Chen and Xiaopeng Jia**

pp.68–74

HPHT is a simple and rapid syn-thetic approach.

The processing time reduces from few days to an hour.

A minimum thermal conductiv-ity of 0.84 Wm−1K−1 is obtained, and a good ZT value of 0.52 is achieved.

The reduction of thermal con-ductivity root in the rich micro-structure and defects caused by HPHT.

SHORT COMMUNICATION Inclusion in Web of Science and Scopus

Thermoelectric properties of Ag-doped compound: Mg3-xAg x Sb 2

Yanan Fu, Xin Zhang*, Hongliang Liu, Jie Tian and Jiuxing Zhangpp.75–79

Mg3-xAgxSb2 (0≤x≤0.05) has been prepared suc-cessfully by vacuum suspension smelting and Spark Plasma Sintering technique. The results show that Ag doping can precisely tune the elec-trical transport properties and accordingly en-hance the power factor, without destroy the ori-ginal lamellar structure of the matrix. A maximum ZT of ~0.66 at 773 K was achieved in Mg2.96Ag0.04Sb2.