Accelerating ferroic ageing dynamics upon cooling

Junyan Zhang; Yunwei Mao; Dong Wang; Ju Li; Yunzhi Wang

doi:10.1038/am.2016.152

Accelerating ferroic ageing dynamics upon cooling

Junyan Zhang
, Yunwei Mao
, Dong Wang
, Ju Li
, Yunzhi Wang

Frontier Institute of Science and Technology

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

8 Scopus citations

Abstract

Once a structural glass is formed, its relaxation time will increase exponentially with decreasing temperature. Thus, the glass has little chance of transforming into a crystal upon further cooling to zero Kelvin. However, a spontaneous transition upon cooling from amorphous to long-range ordered ferroic states has been observed experimentally in ferroelastic, ferroelectric and ferromagnetic materials. The origin for this obvious discrepancy is discussed here conceptually. We present a combined theoretical and numerical study of this phenomenon and show that the diffusive and displacive atomic processes that take place in structural glass and amorphous ferroics, respectively, lead to markedly different temperature-dependent relaxation behaviors, one being ‘colder is slower’ and the other being ‘colder is faster’.

Original language	English
Article number	e319
Journal	NPG Asia Materials
Volume	8
Issue number	10
DOIs	https://doi.org/10.1038/am.2016.152
State	Published - 21 Oct 2016

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title = "Accelerating ferroic ageing dynamics upon cooling",

abstract = "Once a structural glass is formed, its relaxation time will increase exponentially with decreasing temperature. Thus, the glass has little chance of transforming into a crystal upon further cooling to zero Kelvin. However, a spontaneous transition upon cooling from amorphous to long-range ordered ferroic states has been observed experimentally in ferroelastic, ferroelectric and ferromagnetic materials. The origin for this obvious discrepancy is discussed here conceptually. We present a combined theoretical and numerical study of this phenomenon and show that the diffusive and displacive atomic processes that take place in structural glass and amorphous ferroics, respectively, lead to markedly different temperature-dependent relaxation behaviors, one being {\textquoteleft}colder is slower{\textquoteright} and the other being {\textquoteleft}colder is faster{\textquoteright}.",

author = "Junyan Zhang and Yunwei Mao and Dong Wang and Ju Li and Yunzhi Wang",

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AU - Zhang, Junyan

AU - Mao, Yunwei

AU - Wang, Dong

AU - Li, Ju

AU - Wang, Yunzhi

PY - 2016/10/21

Y1 - 2016/10/21

N2 - Once a structural glass is formed, its relaxation time will increase exponentially with decreasing temperature. Thus, the glass has little chance of transforming into a crystal upon further cooling to zero Kelvin. However, a spontaneous transition upon cooling from amorphous to long-range ordered ferroic states has been observed experimentally in ferroelastic, ferroelectric and ferromagnetic materials. The origin for this obvious discrepancy is discussed here conceptually. We present a combined theoretical and numerical study of this phenomenon and show that the diffusive and displacive atomic processes that take place in structural glass and amorphous ferroics, respectively, lead to markedly different temperature-dependent relaxation behaviors, one being ‘colder is slower’ and the other being ‘colder is faster’.

AB - Once a structural glass is formed, its relaxation time will increase exponentially with decreasing temperature. Thus, the glass has little chance of transforming into a crystal upon further cooling to zero Kelvin. However, a spontaneous transition upon cooling from amorphous to long-range ordered ferroic states has been observed experimentally in ferroelastic, ferroelectric and ferromagnetic materials. The origin for this obvious discrepancy is discussed here conceptually. We present a combined theoretical and numerical study of this phenomenon and show that the diffusive and displacive atomic processes that take place in structural glass and amorphous ferroics, respectively, lead to markedly different temperature-dependent relaxation behaviors, one being ‘colder is slower’ and the other being ‘colder is faster’.

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U2 - 10.1038/am.2016.152

DO - 10.1038/am.2016.152

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SN - 1884-4049

VL - 8

JO - NPG Asia Materials

JF - NPG Asia Materials

IS - 10

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ER -

Accelerating ferroic ageing dynamics upon cooling

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