<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >
<lightning:button label="Create an application"
        onclick="{!c.createRecord}" />
</aura:component>

({
   createRecord: function(component, event, helper) {
      var createRecordEvent = $A.get("e.force:createRecord");
      createRecordEvent.setParams({
         "entityApiName": "Application__c" ,
          "defaultFieldValues": {
        'Name' : 'System Number'
        }
      });
      createRecordEvent.fire();
   }
})